Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4521a35063f405…

MALICIOUS

PDF

82.3 KB Created: 2021-04-09 00:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b8467450b1692b61b45571aee2aee6a8 SHA-1: 83b4391bcc867de09c44fe80a552565f83a04f4f SHA-256: cc4521a35063f40533e00188f348096a8fcff4410f5040c696dfa9d724b19491
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/strik?utm_term=most+stressful+life+events+for+couples PDF link annotation
    • https://cdn.sqhk.co/riteximeras/Tp9UEia/48853644264.pdfIn PDF document text
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/1243244.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/8548321.pdfIn PDF document text
    • https://favasonod.weebly.com/uploads/1/3/2/7/132740296/7317f81837c.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/YTCidyM/wd_my_cloud_sync_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/sajunabinume/jhrijbE/el_picaporte_bistro_opiniones.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/zuxof_tewomazozoga.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/8Hlibgd/40433028283.pdfIn PDF document text
    • https://palogipotutaz.weebly.com/uploads/1/3/2/8/132814365/soviga-gazobasowuguve.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/nojevuravubu-razarumerisax-kudifesujupale-jikuta.pdfIn PDF document text
    • https://cdn.sqhk.co/lazaxosu/vUZpsig/tosisiduperota.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/jebupofedijakuk/33219765183.pdfIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_f1ad100abd3f4d4b8e992f0073875895.pdf?index=trueIn PDF document text
    • https://dd6f0c70-611b-430f-b219-ee0593fd0e1f.filesusr.com/ugd/d60051_0eb9da7930534a1baa84303420b4386b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/5890688963.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/mebutelotijudonev.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/what_is_a_critical_argument.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/are_boneless_wings_bad_for_you.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/pigaxubevojugokek.pdfIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_051c0eadc4124aa68c4e7cdbcd4bce28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/zujezudidovufixadefirel.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/zevanigemutegerikupizefa.pdfIn PDF document text
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_127956a7b4e74476b6edc079d3af957b.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_b7416d87cbb540879a4971c2a08cbfdd.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 4864 bytes
SHA-256: c0f79ec7a3a053555fae9c08dc828f2707ab64d5071673a5caa0104bd848a935
font_01_sfnt_off0001150c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150C 10768 bytes
SHA-256: 2711e0a7cc7b22807ac5e2110885fb808611a3c06123dd16cf90aef6eae50679

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