Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c06ca1d7e42e28c…

MALICIOUS

PDF

81.8 KB Created: 2021-03-25 09:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb7acfc2072a27a551548c608e96f4fa SHA-1: ecacb5e05697ca73ddff7b51c765a14e346535fd SHA-256: 5c06ca1d7e42e28caf4bb97b5b334f59040c9a481bb0102811bf1bf66c0511c6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, suggests a lure related to "Canadian citizenship checklist PDF". The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further support its malicious nature. While no explicit scripts were extracted, the structure and heuristics suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=canadian+citizenship+checklist+pdf
    • http://ecoservice-vlad.ru/the_new_leaders_100-day_action_planjtq6o.pdf
    • http://kinorio5.xyz/devesoqrp2a.pdf
    • http://tixshopclub.fun/how_to_cite_pentagon_papers_chicago_stylekntcf.pdf
    • http://axecheat1.xyz/baba_is_you_meta_guidel6g0q.pdf
    • http://xunarepozufuz.mygamesonline.org/pexepefi.pdf
    • http://konalofasu.mywebcommunity.org/sieve_analysis_of_fine_aggregate_test_procedure.pdf
    • http://vetebozo.mypressonline.com/gudelupekup.pdf
    • http://gatorama.fun/bowflex_xtreme_2_se_home_gym_weight5e603.pdf
    • http://vovality.club/homeless_survival_guidecgjon.pdf
    • http://wwbook.org/dopamufanuwovudofbp7y7.pdf
    • http://reawolt.online/iit_jee_mains_cutoff_2016bcib5.pdf
    • http://inglassrus.ru/vakafamodokugugujuvemije3aosq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobovunoberiki/vusukitezuzemelopatukuxuv.pdf
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_8cca644f210e4797b76722e14a6a4cac.pdf?index=true
    • https://s3.amazonaws.com/tufujifinobiro/what_happens_during_neural_tube_formation.pdf
    • https://s3.amazonaws.com/susonanezaj/company_organizational_chart_powerpoint_template.pdf
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_2019590d3a094213994fbdfecfc4b979.pdf?index=true
    • https://s3.amazonaws.com/fonazuzixagizir/jufuxefizatebokuw.pdf
    • https://s3.amazonaws.com/gulapore/how_to_tie_a_secure_knot_for_a_necklace.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/21669528826.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed37.bin
d7bb45481e216039d2f7de17431e1d65cf5abb8f39afbbbbd7637fa7f8f7dc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 5164 bytes
font_01_sfnt_off0000fed3.bin
8afc7b19c1b4dbb2c2d806296284a6dca31006f84cf4d34b0fb14f7d00c62729		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 10932 bytes
font_02_sfnt_off0001243f.bin
281214d1119d96f3a8ebe36682ff3c94e77595198e0ed7d049f81fad77dcdf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1243F 16240 bytes

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