Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6139d4c71711a4c…

MALICIOUS

PDF

72.2 KB Created: 2021-06-03 16:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 33e9f6f91b85881a109f67c75876cb84 SHA-1: 8e1a78c817f2baa26ed79fa1b440af4fdf6f4276 SHA-256: e6139d4c71711a4c53238f7e3176ef5bf510a23a06c16189e7c6ca54c4c09472
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/pbw?utm_term=panasonic+cyclonic+microwave+review PDF link annotation
    • https://lesidodulutenem.weebly.com/uploads/1/3/4/3/134352412/ralemobinusaru.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/jaweral_fuzomejadimeki_zokukuwod_lavelumuzeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fdefc13485ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_604744e01bf53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_6033463f173f6.pdfIn PDF document text
    • https://kewikadovus.weebly.com/uploads/1/3/4/7/134746666/55bdb9.pdfIn PDF document text
    • https://nopubileluzozu.weebly.com/uploads/1/3/5/3/135389839/ad4fe24f700a71f.pdfIn PDF document text
    • https://fexazajix.weebly.com/uploads/1/3/4/6/134669695/robenasasu-ruwajenuxodabo.pdfIn PDF document text
    • https://detitominaxa.weebly.com/uploads/1/3/5/3/135304018/neretivupeguje.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/kuxoviji.pdfIn PDF document text
    • https://zugatuwedi.weebly.com/uploads/1/3/0/8/130874050/e03ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_60419a40d0842.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/8fe96624-8f5d-4404-be6f-5dcd097e11bd/virginia_woolf_orlando.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43917f13-bd51-4e21-a400-1d485d7aaee0/kubejuwozurobafidaburep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88ba8d6-088e-4179-a7b9-7d42b0621275/misufifesupalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce78d91b-bf1a-4585-9792-2927194b3fc1/hillsborough_county_schools_reopening_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10e6283-cb21-4a96-9651-7f78b897e6af/radosabap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1919c490-19ea-4d1c-86e2-88fd3a5f4bd9/interview_with_the_vampire_claudia_age.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_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 5200 bytes
SHA-256: 43c560a3efd5f98b3afd43889f2d3f7bc162107efd3b848ed43d08e793afee6d
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 10504 bytes
SHA-256: 853618e2c2ef259370d53eb5c4bd456794ef3fa1b088bbfda4b5fe83d557ae0b

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