Malicious PDF — malware analysis report

Static analysis result for SHA-256 17100dd5630ff154…

MALICIOUS

PDF

105.8 KB Created: 2021-02-25 16:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 57a882688893e59d9a14884485ecb2e9 SHA-1: 0f8db81d2d793e9bd510083e12cfe69b3741f9a1 SHA-256: 17100dd5630ff154e5cf06f833c097caba61641c29df0ec324a8d2aed60740d9
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The presence of a callback lure heuristic indicates an attempt to engage the user directly, likely for phishing or a scam. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/aws?utm_term=nikon+d5200+charger+price+in+india PDF link annotation
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/pubatufidera.pdfIn PDF document text
    • https://rugilebeme.weebly.com/uploads/1/3/1/3/131380811/lobapujodelaxekizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_60344b4f286de.pdfIn PDF document text
    • http://pusuwanoxanopo.22web.org/john_deere_tractor_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_601d809a4114c.pdfIn PDF document text
    • http://wisujaf.iblogger.org/copper_chloride_safety_data_sheet.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/6651198.pdfIn PDF document text
    • https://masizomomom.weebly.com/uploads/1/3/2/6/132681315/f5e0844e9.pdfIn PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/a8d104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://walexesanub.rf.gd/73309711101.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/xowasesamaru.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/11882098731.pdfIn PDF document text
    • http://gizugutopaf.epizy.com/aschenputtel_geschichte.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/anjathey_movie_audio_song.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/37858161997.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/bad_guys_always_die_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/bapuzafunejelovelox.pdfIn PDF document text
    • http://zaxalamel.rf.gd/dodupixogarogokuwobexikej.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://scripts.sil.org/OFLIn 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_off00013ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC3 5556 bytes
SHA-256: fab9e6317ce4c8d3447fba3be662a5cf37f1b01fa70d72dfd6fab6f9a602bdf1
font_01_sfnt_off00014db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB1 10860 bytes
SHA-256: 265a541d2b28ed5c0447ea3c07b40d260292c9bea83907ad88a247c0099199f8
font_02_sfnt_off000172e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E2 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_03_sfnt_off00018835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18835 4544 bytes
SHA-256: 66527c9142f16f9f0dfe0b2c9f8b312ecc6aaa1325809b4d419fa23f55448e4a

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