Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a6d464c6f9b4d7…

MALICIOUS

PDF

77.5 KB Created: 2021-03-11 16:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a12c785acafab2a1a23cf9cc91ae06ff SHA-1: 518bc7737b544b00fc86b2d4cb97eefbe810789b SHA-256: 09a6d464c6f9b4d730570cfa5305d4025433b9884a36774a181bfc48793af110
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish for information. The document body, though partially corrupted, suggests a lure related to downloading books, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=english+speaking+book+pdf+free+download+in+marathi PDF link annotation
    • https://jorojesa.weebly.com/uploads/1/3/4/8/134861508/purusalawe.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/memories_bring_back_memories_new_song_lyrics.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/nukefep.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/sofad.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/cricket_score_sheet_format.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/ihHmjcs/planet_earth_streaming_canada.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/vagefoximimavo.pdfIn PDF document text
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/988b70371.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/ihbne60/remofikow.pdfIn PDF document text
    • http://affilateapp.online/financial_times_newspaper_price_ukzishs.pdfIn PDF document text
    • http://terugate.mypressonline.com/vojevonuloledozunulomazu.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/fhfg4gg/sagopemetafabudixazegix.pdfIn PDF document text
    • https://limakeluror.weebly.com/uploads/1/3/4/6/134657352/2614639.pdfIn PDF document text
    • https://wiraxupafetob.weebly.com/uploads/1/3/2/6/132696263/zukimukudetix-muzaki-seles-topogojobo.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/yijTjb6/class_10_maths_ncert_solutions_chapter_8._1.pdfIn PDF document text
    • https://duzigolanulemo.weebly.com/uploads/1/3/2/6/132680867/wutoloraruxiza.pdfIn PDF document text
    • http://airned.ru/android_version_market_share_canadavm4pl.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/fifty_shades_of_grey_darker_online_greek_subs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_830126ff33874fecaea99701d5038362.pdf?index=trueIn PDF document text
    • http://kagijido.myartsonline.com/what_does_saturated_mean_in_chemistry_gcse.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_1a62eb034b354ed6a7b1f43f5d5f75cc.pdf?index=trueIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_b56a2c57a6ee4386b06f2cde09e561e4.pdf?index=trueIn 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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 5708 bytes
SHA-256: 1544594e16e5d40e015698cd24796398c4ceaab1a6b249f54dee719ccd6ab4ae
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 10140 bytes
SHA-256: f6727286bdc818b624959418df0cc8d792c6f052c662abd1779e858bd6ed4f10