Malicious PDF — malware analysis report

Static analysis result for SHA-256 819175667c61c859…

MALICIOUS

PDF

72.0 KB Created: 2021-02-17 23:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2f2a2bf42a20e6dd7ecae05a1fa6a098 SHA-1: 579a5a1b344cdc3a45e672f4c42c0689277c63cf SHA-256: 819175667c61c859853313ecece1fcba713f6600197a3ce7597b5831aff5b23f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm designed to manipulate search engine rankings or direct users to malicious sites. The primary URL, https://maypoin.ru/wix?keyword=lopi+answer+best+price, is likely part of this scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://maypoin.ru/wix?keyword=lopi+answer+best+price PDF link annotation
    • https://dudixugodibemuf.weebly.com/uploads/1/3/1/4/131406925/xotofukewu-levefufigab-jojuwimisuxux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_601448c9780a5.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/8UiTgj0/disorderly_conduct_pa_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_5fd7cc5589339.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/2DzkghY/change_lock_screen_shortcut_iphone_x.pdfIn PDF document text
    • https://kapejipe.weebly.com/uploads/1/3/1/0/131070538/toxitekidi_pojetapexuwof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5fe3da5e51334.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/jokotaziweluge/munapilesan.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/dobubadutiru.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/73509580365.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/digebef.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/kapemolog.pdfIn PDF document text
    • http://tezitap.rf.gd/allied_telesis_at-_fs708_poe_manual.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_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 5068 bytes
SHA-256: 3038607c5bacbda4adda814261c3198fd1a9c9b632e5c0ac935eef280990b539
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 10416 bytes
SHA-256: d46cc2cd913346bd66afb3a617c9ef8c00142c4733c65f6fe2e45c58b028a834

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