Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a07562f9d0519e…

MALICIOUS

PDF

75.1 KB Created: 2021-03-11 20:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0de72412fbae94d95a6eeab983438ffd SHA-1: 521ff1ed9f6d88f79ad0bbc5fbb8cd67a8a8cd3e SHA-256: 00a07562f9d0519e5b32bbac7aa99c130cc9672dca57a4f941a53e240032ff5f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed and point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=current+feedback+operational+amplifiers+and+their+applications+pdf PDF link annotation
    • http://kuworekokinig.medianewsonline.com/craftsman_14_2.5_hp_electric_chainsaw_manual.pdfIn PDF document text
    • http://9gusevshop.space/263654416039kfd6.pdfIn PDF document text
    • http://kulokozataxat.22web.org/27845044252.pdfIn PDF document text
    • http://good-production9.site/11615076937xwsax.pdfIn PDF document text
    • http://getcreditcheck.info/zunasewolegv9yca.pdfIn PDF document text
    • http://birodavaz.22web.org/joyce_meyer_battlefield_of_the_mind_bible_review.pdfIn PDF document text
    • https://wobajaxeme.weebly.com/uploads/1/3/4/3/134350369/2449855.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/miliwixuverame-zejitus.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/37515231686.pdfIn PDF document text
    • https://dixonojobu.weebly.com/uploads/1/3/3/9/133997274/gejuzifanowufug.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/lewuli/physiological_reports_impact_factor_bioxbio.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/job_handover_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/winogufekifowikeg.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/43336234888.pdfIn PDF document text
    • http://mepitar.atwebpages.com/jimutikulugexem.pdfIn PDF document text
    • http://vazuxonedadid.epizy.com/digital_marketing_course_free_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/89448935632.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/54540274694.pdfIn PDF document text
    • http://widabuve.epizy.com/sheet_music_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/petijakabonoberedapirixu.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_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5504 bytes
SHA-256: c89227d183d08f3765adee46c23a1d77b1577a80fa27d4b42132ac2bf0baf9ec
font_01_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 10032 bytes
SHA-256: 584e7367f31fd4ba2548cf471857cc6433bbb75ef0164c6b8ba2761a2a7ea946

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