Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bde0a2f0da1f5d…

MALICIOUS

PDF

72.0 KB Created: 2021-01-03 02:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: adac3b04cf4c33dba4536c5102983445 SHA-1: d03268fcd8bfbac64b5f17ed2d0260287019c4d8 SHA-256: 77bde0a2f0da1f5d39b30d7ffae68d720ae6a7e763d8df9702c602c16e7f2f20
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL leading to a suspicious domain. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect the user to malicious sites, potentially 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://trafficel.ru/aws?utm_term=activeperl+5.+12+64+bit PDF link annotation
    • https://cdn.sqhk.co/pegidago/ghbBvjf/55311866703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369646/normal_5fcba5791273e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_5faf4a86d6025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_5fa114778312b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391909/normal_5fc73ee845ec8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_5fe16006513c7.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ghZNIia/all_saints_instagram_hashtag.pdfIn PDF document text
    • https://cdn.sqhk.co/dexavoba/XU6HPUk/jemiwapowiligisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fc164b7af671.pdfIn PDF document text
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/gulujuj_xefaditozoge_gepuvuvize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f94d1fd3c932.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/gfMiihi/my_defender_bethel_lyrics.pdfIn PDF document text
    • https://ruwawowek.weebly.com/uploads/1/3/2/7/132712040/nubirefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5fd7d0a474557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87092e75e1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 5312 bytes
SHA-256: 583a6d5de5f8170537bd09c381343550933efd418f38eedc38bb565a0f975557
font_01_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 11024 bytes
SHA-256: 2438eb86e2c85fbdabf46de74920e14b6106d13a237110ab96095b5088365d79

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