Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae197deee7c7c94…

MALICIOUS

PDF

66.2 KB Created: 2020-12-03 11:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb80c069979e0a21bbd8b28da5672dcd SHA-1: e667b753a7c1df192b0ef8d9e6908248a97b0aa7 SHA-256: 8ae197deee7c7c94c8411779028db9d848952a2c265009c261ac6279ac3982e9
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a malicious redirector and part of an SEO link farm, designed to phish users. The document body, though heavily obfuscated, suggests a lure related to 'free printable worksheets'. The primary IOC is a URL pointing to known malicious redirector infrastructure, which is likely used to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=free+printable+boundary+worksheets In PDF document text
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/sigatavima_miluv_xusosuxizumem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc79d1d-5159-40e5-9d92-4cd1c2a1a8af/gonubawexudolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52ff0bf-b882-4022-badc-f1faa2e5a6b0/vusowipetivurag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a174e1-d93c-49a5-b66c-c089eb130088/questions_on_the_us_economy_during_the_great_depression_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59e0f6e-6963-41bb-b385-9ae831972de2/narobokazamomubesezurarol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6af8093-657b-42fd-8c4e-c661bb8a942d/97719408707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7148d31f-e74f-4837-8d4e-ba6e799d8bda/mijovotoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef449d104e5f152c78ec/1606217543052/72161701779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717ac3e0-188d-4449-9df4-2bec5706f231/teach_yourself_visually.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/printable_music_theory_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/66256475581.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1fc7e6d49a06bb5a2eb3/1606295497352/75965383494.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A5 5400 bytes
SHA-256: a65467778aaa341af6e82d2e93f95cc8b3f67bd39287f46f899a0e226bdd34f7
font_01_sfnt_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 10336 bytes
SHA-256: 39cb30216932ba057a88e924fa0ba98d03e13290544776203b6fef517f7a20c5

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