Malicious PDF — malware analysis report

Static analysis result for SHA-256 37dde29e7115ac97…

MALICIOUS

PDF

81.6 KB Created: 2021-04-02 03:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 197e7a5742ca95d35a8614f9a345d872 SHA-1: 1811c29a942aba8d509d1387ee73dbf700bf56f3 SHA-256: 37dde29e7115ac9729534e2c41fbb055631a36dea5de8d73747e3ce45c4cbe0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://resalured.ru/wix?keyword=letter+of+authorization+to+travel PDF link annotation
    • http://jerimujolegem.medianewsonline.com/48182820379.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/47368454170.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/fGOhjcY/apfelsaft_holen_bilderbuchkino.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/9708787.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/juvarepasumobiloda.pdfIn PDF document text
    • http://fortuneocredit.com/kepilulosatulifotizopavuc4dnu.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/vemilidigejutigevad.pdfIn PDF document text
    • http://creditstar-kabinet.com/how_to_reset_swing_caddie_sc2009lmdc.pdfIn PDF document text
    • http://constructionhouse.info/how_to_remove_carburetor_from_briggs_and_stratton_riding_lawn_mowerguep9.pdfIn PDF document text
    • https://dukagalirizaz.weebly.com/uploads/1/3/1/8/131856141/duxexijezolepero.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/clasificacin_de_los_numeros_reales_ejemplos.pdfIn PDF document text
    • http://tehnopolis.org/zijilirokoba78isr.pdfIn PDF document text
    • http://kismykeitio.best/codes_for_actron_cp9125y270d.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/xijem-gamadar-tiwapesapavuvom-sufebogojax.pdfIn PDF document text
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/3404977.pdfIn PDF document text
    • http://ver-alex.website/wozuwuzixutugenofisasoxa5cy10.pdfIn PDF document text
    • https://kusazejur.weebly.com/uploads/1/3/1/4/131437880/wezazaf.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/fgcTicU/crossword_puzzle_clues_la_times.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/da61a329-9347-4f7f-8122-2eb96e189695/how_to_write_essay_about_myself_for_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a76bac-6f2f-4192-bcca-5b30851fde47/denogedixesunexurixi.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_off0001027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 4728 bytes
SHA-256: 8aa97dda000b002ee41994a59c1184086c7c1478698f641964d4bfe809eb55f3
font_01_sfnt_off0001129c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 11376 bytes
SHA-256: 8b1879b5cb232792f315ca0220dc0b1b37249db0679da10388e59179dc67b20e

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