Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d026579c038701c…

MALICIOUS

PDF

71.4 KB Created: 2021-02-14 17:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d91c049407ce62387e92c9939dfa4487 SHA-1: 98df8bcfb3688072920a64570a56a1b84e4634fe SHA-256: 3d026579c038701c2d53a9996080bec337face711c4ef5a9e4cbb001a10d55e9
146 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://druttle.ru/wb?keyword=picsart%20apps%20%20old%20version PDF link annotation
    • http://tikukef.22web.org/crystal_report_for_visual_studio_2013_c.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/buzukako-pofuzito.pdfIn PDF document text
    • http://7evenrp.ru/4155565114rn5r9.pdfIn PDF document text
    • http://dreabling.online/game_chin_tranh_vit_nam17hqy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_60224b93e19c4.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/hchbNib/1808840549.pdfIn PDF document text
    • http://nout-prokat.website/nesenixem20t9.pdfIn PDF document text
    • https://vavozeja.weebly.com/uploads/1/3/5/3/135308761/7648b6ed3320fb.pdfIn PDF document text
    • http://geniputan.66ghz.com/schitts_creek_episode_guide_season_1.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/63d3a.pdfIn PDF document text
    • http://vizionsmc.net/thrift_stores_open_near_me_furniturew3g2q.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwobevina/uhgOS3m/mefodupexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_6013bc65a608d.pdfIn PDF document text
    • https://palotuzumi.weebly.com/uploads/1/3/5/9/135991270/bubakumelulum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_600dbfc3a8e95.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/viJX6hh/88136079019.pdfIn PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/275405.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/jdHvGQq/the_walking_dead_our_world_forum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wapowidomuf.epizy.com/free_addition_worksheets_second_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/go_math_grade_6_answers_key.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/jerojegivil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD947 5128 bytes
SHA-256: bca6330f26bb9c994f38a11280bca9e3cd06c1b0bf5a1274d8335606ec311ac3
font_01_sfnt_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 11144 bytes
SHA-256: 270d4e0668e3eda59179a30f3513ef394cb07950000ec7bdd1d8b4b3b9c04090

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