Malicious PDF — malware analysis report

Static analysis result for SHA-256 3003b8fa7e4c7f20…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 01:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7e19e23ec2b61636de69cc904ccfa304 SHA-1: fd2cedd5acd559810a3835e38b1ebb4a921ebe5a SHA-256: 3003b8fa7e4c7f2040e2878b01641b6957386453bd89f03d5a28607383e2ef5b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The heuristic 'SE_CALLBACK_LURE' suggests the document is designed to trick the user into calling a fraudulent number, consistent with callback phishing or tech-support scams. While no scripts were extracted, the document's structure and embedded URLs point to a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f49a9fe60874f85430078f93420b9ea3/fanuviwuvod.pdf In PDF document text
    • http://granitemountainranch.net/userimages/jumamapugon.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/5072337020.pdfIn PDF document text
    • http://klinok-saintp.ru/files/67183533691.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/33983165953.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/legama.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16125901e7f62d---rotatibuwavemu.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/40641046035.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f619005038---38820752157.pdfIn PDF document text
    • https://777mto.com/contents//files/wamodikamopepugugosidune.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/loviwawobu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcb6f35e7a---vaxap.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/vj32tlvi3heh14emal3vmeno46/lomevepagovepekalububojik.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/joxamafakezobavimuk.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/2q2l113hgck3tf7jccpq7ea7do/sosofujaxasijorixov.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d9dd4a5ab6d0f3037b647d0a5afff1a3/tatoberimomifijosuti.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/96772410714.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/68812954245.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/2704120944.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f28439bef---94712251479.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/wajokexew.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/h85c3nsoi9k80hegj0jpa68rfe/22922023979.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/45870181078.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/507870807.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lotapokunokigisujin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+victor+parqPDF 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_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 18924 bytes
SHA-256: 8e06274a110a3e5b2ef87a41295e7764b74ab6e0a5f522a2ca9db1f3afbf26c3
font_01_sfnt_off000115a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A6 10328 bytes
SHA-256: 9d66b71f9f4274668514fb1d65072659e57b6066464b61d49a6bc0feb67db5a3
font_02_sfnt_off00012d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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