Malicious PDF — malware analysis report

Static analysis result for SHA-256 80563ca248692359…

MALICIOUS

PDF

99.6 KB Created: 2021-09-03 23:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 23ceecdc601b271431b69f358d62061c SHA-1: eb0f8e488ea970c8ae075e199ae79c9a95e8aa28 SHA-256: 80563ca248692359bd0a4e4837c5e548e9b53403c1f1ce0baa57b38febaba8f8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://garglob.ru/uplcv?utm_term=2012+chevrolet+impala+ltz+owners+manual PDF link annotation
    • https://luyenthitoeic.info/userfiles/file/70292827632.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949fc79b6e0---sutavunevujef.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-23/20210723083059252908.pdfIn PDF document text
    • https://unitjaya.com/contents//files/taridama.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/32c86626ab77c7fa746c8fadf720d0c3/15118082931.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/33117426702.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607016f00af14---bekamojadat.pdfIn PDF document text
    • http://metallpress.info/files/17618718420.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16072094693731---mafemazivibobape.pdfIn PDF document text
    • https://actor-conseil.com/files/file/moxemalirixesor.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/jipoxezujomozerifatugomik.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/79217310314.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/bapusugibupetepi.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/80830530477.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/lobalamowumikibid.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/sofujolunikadudaxipu.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v9v6t4o3kdcmfv0hjhnqeuthog/25945518320.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da80969f22a---27227464919.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/patuwoderedejixeza.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/rozetapefiwanenixewok.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/puzeb.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/50960920297.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/limulopijesas.pdfIn PDF document text
    • 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_off00011cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC3 11148 bytes
SHA-256: 005189d273566f186ede709e917fcf999f8ba88b458b25a10d2e0aac91d39da8
font_01_sfnt_off000136d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE3 19236 bytes
SHA-256: 058bba1160d211478885c55fd760499b1fa1a633804936a9442e91c51e5c1194

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