Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfb30be4f182f29…

MALICIOUS

PDF

76.5 KB Created: 2021-03-04 10:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4946a597879667717b5336110780d805 SHA-1: ed7943922fe7eb2e96a796edb70803d694fbb7c6 SHA-256: 9cfb30be4f182f290cf9122f0947ae447d19b4d60e37e94e958a616318f91e1d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly and other free hosting services, suggesting a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to direct users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://resalured.ru/award?keyword=tom+clancy+ghost+recon+breaking+point+review PDF link annotation
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/4732ee10be56a9.pdfIn PDF document text
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/lelusolela.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/relivuwebofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460241/normal_5fe99f7c1c703.pdfIn PDF document text
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/pefiza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5ffc5f41cff51.pdfIn PDF document text
    • https://tikivumisa.weebly.com/uploads/1/3/5/3/135346314/japadogoz.pdfIn PDF document text
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/2568937.pdfIn PDF document text
    • https://raxefikijizusiz.weebly.com/uploads/1/3/4/8/134881470/tofojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumagabu/vekezemafovuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/98205008409.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/shaffer_blowout_preventer_manual.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/zojirushi_ns-zcc10_jasmine_rice.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/entrepreneurship_curriculum_guide_senior_high_school.pdfIn PDF document text
    • http://dipumekamerara.rf.gd/crystal_reports_2016_end_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/42544554711.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/titanic_movie_imdb_parents_guide.pdfIn PDF document text
    • http://ziboporo.epizy.com/ashes_of_love_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/cricket_score_sheet_free.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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5756 bytes
SHA-256: 2abff954154506592e2a70da27d7f88a1c2db611eac86aecf57b855a54ce9e93
font_01_sfnt_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 10636 bytes
SHA-256: 351d667d933084004f1e0b24277a145cfef0880ddc2bfec9caed46b818fe1af1

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