Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa0ed69ea67b2eb…

MALICIOUS

PDF

70.8 KB Created: 2020-12-08 22:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 99b3a5c3d4736267018a1912c5e3e9de SHA-1: 486fd72b4cfdf855728c61b4c117399e43f2bbbb SHA-256: cfa0ed69ea67b2ebd4dd35adb4f3ca1bf235d023ddbed4e765694b2f0b4802c5
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/123?utm_term=magnum+contact+sheets+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459917/normal_5fa3f2f602ad5.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/goteki.pdfIn PDF document text
    • https://riwubabefos.weebly.com/uploads/1/3/4/5/134591520/2363383.pdfIn PDF document text
    • https://perumazenete.weebly.com/uploads/1/3/4/3/134374831/2ec22b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5fc18d0bb6f72.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/loxovijevifam.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/xodasoniroduga.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/fowenademojogo.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/zezojenada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6858cd49dd124475b394f/t/5fcee1d5faf0bc04d1bcb713/1607393753700/35505779397.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc0df35f81c9a2a0cc2aead/1606475574438/pewunivatugirixekosekod.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/jakupepetubez.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/4th_grade_math_word_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ruletetunima/8831682431.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/ethical_hacking_app_for_pc.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_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 5336 bytes
SHA-256: 74bece137d19f23ee8fd91af6f4e653badf73e964cb362d6bdb43ccea7252007
font_01_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 10876 bytes
SHA-256: d88da4c2c39bc5498d30e2c05905275a9ed0142e7bcba49279377f870ed582c0

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