Malicious PDF — malware analysis report

Static analysis result for SHA-256 d694ccffa88ca070…

MALICIOUS

PDF

108.2 KB Created: 2021-02-01 15:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 45c01806777d3febc4b1830bf4a5444c SHA-1: e1ab1aa42834b731b4be36b8c070d5201d4a6771 SHA-256: d694ccffa88ca070a34f083c538aaa15eb8616701ff2e4849230e35fe3fc6b24
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/123?utm_term=ap+world+history+study+guide+unit+1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415326/normal_6008ddbe28dd6.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/iihgduR/t_mobile_unlimited_5g_plans.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5fee6cb2ef4ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468534/normal_5fd083f899644.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/B1Mwiia/road_trip_songs_country.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/Yhcgeij/31467734851.pdfIn PDF document text
    • https://pulufakifene.weebly.com/uploads/1/3/3/9/133999255/vaxafizopubeguk_mabumanejobe_bejogokebaxik_mefesibolapib.pdfIn PDF document text
    • https://rizafosukozesal.weebly.com/uploads/1/3/5/3/135346652/polaxonoz.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/rQgEThd/srs_xb12_manual.pdfIn PDF document text
    • http://pek-24.cc/mixsmash_marvel_mashers_mod_apk_version_20205rzya.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/devawusilij.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/hiwKiaa/banopixuga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vebenok/10079284104.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/xedejinutozamekux.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/baby_shower_invite_template_for_email.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/biology_essay_questions_with_answers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D7 6872 bytes
SHA-256: cfd810a5ea282119da4c1abf509a1e6bf8c77e42bfdbea3e308bbcdcc7c40f73
font_01_sfnt_off0001332d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332D 5128 bytes
SHA-256: 2e262a2301b13e3be66374148176bf91dd67734106c51812aa32b87f63c8de55
font_02_sfnt_off000144ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AB 10296 bytes
SHA-256: 0a8a87e40e7067371a403264985df3b01e30311d17652adbda4495274f06438c
font_03_sfnt_off00016537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16537 11568 bytes
SHA-256: 5e0c1b18e183e8e52bab16a6643a32de565582bd95c93cab103bdb182c90898a
font_04_sfnt_off00018c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C9C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_05_sfnt_off00019a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A4F 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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