Malicious PDF — malware analysis report

Static analysis result for SHA-256 924a2eddbcc0a5fb…

MALICIOUS

PDF

110.3 KB Created: 2021-06-26 03:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 515cfd0a07d953184d6e421132b598d4 SHA-1: e34c5077d2a095e114c27ef62f071decb5630b57 SHA-256: 924a2eddbcc0a5fbaa438adc90758abf10f6b7283ab7db057e0f5037b2bcb4c5
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to disposable hosting or compromised CMS upload storage, indicative of a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic suggests the document may be designed to trick users into calling a fraudulent support number. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence score strongly suggest malicious intent, likely related to phishing or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

Heuristics 6

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ms02bet.com/contents//files/disivibumo.pdf In PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/bkthsdcvsv9jp68r3f8qp9g37q/jujosowobikuwor.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/33906507492.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/66222499798.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befcf4a9271---14100158816.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb7b37d1c---364588770.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6b145628ae6975b4c0582474c5d0adef/mimimirefufu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/84567418574.pdfIn PDF document text
    • https://tipresentoio.it/images/file/88303813226.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/e6164de8094b56879d8c59e9865cefbb/9950091266.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/perodefofafuwepanolonug.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/0d7c21475cb8e2159bc472ab44405eac/giretogenibarilewaner.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/ketijepefujetox.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16077aad641eb5---48791934266.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/60649335623.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607224db51584---werajadudidurokew.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cdd0712ca---gikebajajewimaneko.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607175ba884ef---3396534712.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/45699267730.pdfIn PDF document text
    • https://vestol.bg/files/file/21091061127.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609224efc12bf---73025159283.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/72973355035.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/lafosawiramekinufafixawaj.pdfIn PDF document text
    • https://etadelloro.it/images/file/kesizakopadugixona.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/89009547787.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2ed1a5a35f60ff8de8e3aa534e08c581/67571817417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=calculate+molality+from+molarityPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001332f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332F 10468 bytes
SHA-256: 05b9bfcf805811378b945c4ce12026f57f01d34e6e53c47718c25345273c69df
font_01_sfnt_off00014b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1631A 19048 bytes
SHA-256: bd31b52befce9ac9af08c7de3042ce90f220590b8955f189d94e934a2a62eea0
font_03_sfnt_off00019601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19601 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c

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