Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f81e12a9076faa0…

MALICIOUS

PDF

96.4 KB Created: 2021-01-18 02:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 57d669eed61f5f28633bf882ad072c1b SHA-1: 95064179b7c665767cfd1fba62401c46a1978f37 SHA-256: 1f81e12a9076faa024ecdb1815f1af2cc20f45f27271893f7462325b0f8c8728
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://trafficel.ru/123?utm_term=dry+measuring+word+whizzle+answers PDF link annotation
    • https://jalizirut.weebly.com/uploads/1/3/5/3/135308553/liwimesifovir.pdfIn PDF document text
    • https://site-1175494.mozfiles.com/files/1175494/19223560378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490138/normal_5fee81d66a06a.pdfIn PDF document text
    • https://site-1172875.mozfiles.com/files/1172875/aashiqui_2_film_ke_all_song.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/2093094.pdfIn PDF document text
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/xipebu.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/gejitiviz.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/a24e0635b2f78.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/supugajewone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5fb6ed87eea37.pdfIn PDF document text
    • https://site-1204325.mozfiles.com/files/1204325/hockey_keeper_pak_kopen.pdfIn PDF document text
    • https://site-1166647.mozfiles.com/files/1166647/new_ringtone_song_dj_2020.pdfIn PDF document text
    • https://site-1171131.mozfiles.com/files/1171131/fuwixi.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/nolarifaforuxop/pipe_bending_machine_project_report.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/99650789878.pdfIn PDF document text
    • http://zezajezo.epizy.com/5704643596.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D63 5480 bytes
SHA-256: 6cae3516a19c79090dfd7c0fd77f36b6f3de121146612d6015445694fb6117c2
font_01_sfnt_off00014ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFC 10160 bytes
SHA-256: b1d640508df42c57636b27522bf5cc2396fa954c65bf0d66551c7f5717a0ff8a

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