Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d629c0586f1c4ca…

MALICIOUS

PDF

74.1 KB Created: 2021-03-18 18:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b352e43e8719244cde4e8804de5ebf71 SHA-1: 1fe7181dd496336b71d791be85fa7cb18ce90332 SHA-256: 9d629c0586f1c4ca80e43149152a546536b3993f36dea725bffb8669daeef065
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 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=libro+los+compas+y+el+diamantito+legendario+pdf+gratis PDF link annotation
    • http://xamakag.iblogger.org/37956556248.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/ae494160e7eeb8c.pdfIn PDF document text
    • https://zexuboru.weebly.com/uploads/1/3/2/6/132683252/remepojepiputesibepu.pdfIn PDF document text
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/85fa072ebbe0a1.pdfIn PDF document text
    • http://faxadiweruxu.22web.org/77110267960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/21449396074.pdfIn PDF document text
    • http://jolafefiluw.rf.gd/rodonatilito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b67afb-1240-4566-a189-f4acff694a1d/what_bible_says_about_single_mothers.pdfIn PDF document text
    • http://jibogifimot.epizy.com/wondershare_filmora_8_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72350927-a3c6-4a71-846c-ce8ca44bf026/mumovivozisuwowone.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_b2a1ce97f9754e6896601fcdb2e396dc.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_af7a814591744ffcb244e8064c212a49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/vodepagazuturison.pdfIn PDF document text
    • http://konevimojo.epizy.com/4229184869.pdfIn PDF document text
    • http://nejapem.epizy.com/surunu.pdfIn PDF document text
    • http://bupebubu.epizy.com/larson_algebra_2.pdfIn PDF document text
    • http://dolevegun.epizy.com/maxagolakuwixezu.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/forces_and_motion_phet_worksheet.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_off0000dea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 5660 bytes
SHA-256: 8506313332ac499d2b6cafcca5390662a2a4ed37f356f9774ac1b7454339bbab
font_01_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 12064 bytes
SHA-256: 3f85878e0c491232a7f0b9c2d87a70c5dadad40014c8118ddf4609d4cfa774b2

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