Malicious PDF — malware analysis report

Static analysis result for SHA-256 48adcdac96545e69…

MALICIOUS

PDF

79.0 KB Created: 2021-09-12 18:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5975ca3b19b2733858cf5753573659df SHA-1: 2302e78ad7071ecd53ee6a0f4d773c1adea8a1e3 SHA-256: 48adcdac96545e697fac5fdae2cd81f522fee09336a745407f36610e14b70526
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates tracking for potential phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=power+play+android PDF link annotation
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/27948898191.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210908055841.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/negubenagubujuwedutaze.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/salevidudaxapekudojeg.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/susidinenidilozipimaxane.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/9253245913.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613140f712052---465328488.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/sirevusopenemoli.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/tusoredi.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/51848622189.pdfIn PDF document text
    • https://adci.vn/data/upload/file/60325838912.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/63718349692.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/serikilekefimalexu.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/wedeveduzabusobenuv.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/gororev.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/594g2pqcsfc0p6tl0ag7kjrei7/wixulowiwavi.pdfIn PDF document text
    • http://newworldss.com/uploads/file/wedevananaselilej.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c976d8ac55---32971090733.pdfIn PDF document text
    • http://labonscafe.com/userfiles/mowawile.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210905183400.pdfIn PDF document text
    • https://forssh.com/userfiles/file/tolosumabegotut.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/98012696380.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/5385998842.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/27538631712.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/15945144257.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_off0000c995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 10320 bytes
SHA-256: 9db366c7d04c677d808005a9527ff78ba6f666dc8e68ca4456cf5339984ebc9d
font_02_sfnt_off0000f906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 20568 bytes
SHA-256: 66af5886397aa47a1e67b928ef734553dd97c9f5f356ffec0b1e22f98d47c916

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