Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ee9d113436a914…

MALICIOUS

PDF

103.0 KB Created: 2020-11-11 05:38:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0452367a6de29ab7ad76159fbce8041d SHA-1: b289441bc17d3d0fc6153f934ccad884b25f95ed SHA-256: c1ee9d113436a914cb59727c927600be6c507b811352326989d1a77f0340a354
196 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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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?keyword=bohr+model+worksheet+high+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8c7dd0cfaf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fab539218b77.pdfIn PDF document text
    • https://soleduni.weebly.com/uploads/1/3/4/5/134581057/b2f37fe9ab6523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f8eda8df0ce4.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/5ea52a53be3cd.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/d868a6e3-0b3a-4b84-a163-f229e4ede2b2/sobumewadufafemobes.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/rixub.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/diy_phone_case_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f6fe89-aa6b-408d-93d6-c0ffaab051d7/sugovusuterez.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/agricultural_economics_course.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/82422726119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f535ca13-c3a1-4c55-a34b-ae4aced9bfbb/73424828187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6f12d7-73d8-4caa-8ffd-1c8db6610fd7/kukifowasoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36845174-9ea5-4ca4-ab0d-b285eb940600/epictetus_the_manual_of_stoicism_sparknotes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE1 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off000158db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158DB 5348 bytes
SHA-256: 59923ae2ea04d56942abb255c4f0e6b4f4103f8bf3c2a656b3a3de56dbeca20e
font_02_sfnt_off00016b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B01 10460 bytes
SHA-256: d694fd471c0226fc90b188ed05f548e50748fee9237d5f65f973180145b08f70

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