Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b30ebf805d6dd6…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 20:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3de1552271065c1cedcede0f4f742f4 SHA-1: 9893c7a1ba57770cf780464b0bbfee3e33259c5b SHA-256: 69b30ebf805d6dd655b617e452e31a14b9d9a5d52d9514a484654001f7940f21
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm, with many URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing pretext, aiming to trick users into calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://campfirewtx.org/userfiles/file/xesitimeke.pdf In PDF document text
    • https://v-rshine.com/upload/images/files/kozunoj.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/xekudopitubikunujotutipi.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/zigakirojajoveg.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/60165290153.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/48235476468.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/xugokelub.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bb6442408---wogedubifebanolunagozol.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/peduxixijibiduxozuneg.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/tukikepuvozikep.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/tefakepip.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/38077173830.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/regawalivodovizofur.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/smv84r7r3lahrt6f36dj33b5je/8781786005.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/totu0pp2tforaa02ki05uehfo7/lusedatozudabenavo.pdfIn PDF document text
    • https://strechybenesov.cz/content/43474246528.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/53009957748.pdfIn PDF document text
    • http://grimastone.ru/files/99462063349.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/janomowabi.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109081116049467.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/vakoxobuxidipunu.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/42236307690.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/51975959342.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/85336278661.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1630671593.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134db4ac37d1---39242782444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sorry+not+sorry+pdf+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 17956 bytes
SHA-256: 300ca8bad7af4c5740cfb659d4cdca31d2e95e2902f3f5b41056a60be74f8175
font_01_sfnt_off00011064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001287b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 10540 bytes
SHA-256: 71f7f39f3156a3429bd193f6d4bb36095d5f137718b6fbc241c0d9d1ed548be2

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