Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b8597f6258ac3c…

MALICIOUS

PDF

68.3 KB Created: 2020-11-18 15:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5410a787b9c7dc813c524b0fe29fad62 SHA-1: 4c2d4f16a25048c149ffd44f3facdd00bd639b9e SHA-256: 70b8597f6258ac3c8216276fa33327a2af3f4ebd9b8cb6dc53ac07bb38a7e3a6
156 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 5

  • 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.
  • 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://trafffi.ru/strik?utm_term=resumen+de+la+obra+zambo+salvito PDF link annotation
    • https://rimowaxa.weebly.com/uploads/1/3/4/6/134610435/dazud.pdfIn PDF document text
    • https://mokogexikimowo.weebly.com/uploads/1/3/4/3/134321985/wavevenapezuze-xijegozopuvusi-powemasetubun.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/novowitubimuvoj_bisenutumutivuw_vakiw_bepafoxu.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/noterufuwuxavo.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/7482984.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/dinilederu/59979924322.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/workout_plan_for_gym.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuwaterexaf/43437040534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc41613-0afe-4203-8544-f94226f54c69/scissor_lifts_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e97244e-e5bd-4b2e-9258-772b88051035/rijunodibuxuxukutufasum.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/43116690665.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/dmv_nevada_manual_espanol.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/dizozoxiki.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_off0000ccdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDF 5228 bytes
SHA-256: 75244f437316a4a878cb0543c1fa61ebcf2b9287044ac8a65c6af899eee5bd36
font_01_sfnt_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 11112 bytes
SHA-256: 90986aeecac9ae6ee86cabcc87fadc80a75a7de952bd575a332a673db71288b4

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