Malicious PDF — malware analysis report

Static analysis result for SHA-256 a326dda757f0350d…

MALICIOUS

PDF

77.9 KB Created: 2021-02-26 06:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 038343dd8a05654073d58091a2a9d3e9 SHA-1: 2d6ad9f00ebca3ce775f46f93a5e249d761ce1b2 SHA-256: a326dda757f0350d2185128dbd6f6385eb3c8663e9f999740965fa10c7ccbb7e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to academic materials, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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.
  • 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://baarspo.ru/123?utm_term=hughes-hallett+applied+calculus+6e+answers PDF link annotation
    • http://xiwakaravivomik.scienceontheweb.net/how_to_apply_for_a_summer_job_at_disney_world.pdfIn PDF document text
    • https://saxeguwub.weebly.com/uploads/1/3/1/4/131406831/9095621.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/13514572909.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/d30ea10bd17cb.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/what_happens_if_you_fail_mos_school.pdfIn PDF document text
    • https://pabaxugu.weebly.com/uploads/1/3/2/6/132695470/paxeriwetawuwud.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/powifemudu.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/gjgidQF/rapunzel_tangled_adventure_episodes.pdfIn PDF document text
    • https://saranadizalexe.weebly.com/uploads/1/3/0/9/130969301/1154534.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/cxXpggp/houseparty_fortnite_wrap.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/english_grammar_in_use_elementary_fifth_edition.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/57613368990.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/8219257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xajowu/fajardo_estimate_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/29471963211.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/18319126308.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/11176379277.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/vidyard_android_app.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 5348 bytes
SHA-256: c2967d4b4fa0f196e0fb6796354e65e1b0a44d3edd21327489a04a68fac741a6
font_01_sfnt_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 2116 bytes
SHA-256: 1f756b46481ac718095810e133e155ec1caf818687d25c20e8b002f727d713c7
font_02_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 11128 bytes
SHA-256: fd0485a5f9897e88becabc27288e2952489fa731cb9eaabdc6f8df84112d06e4
font_03_sfnt_off00011b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.