Malicious PDF — malware analysis report

Static analysis result for SHA-256 e716ea75879aea01…

MALICIOUS

PDF

80.3 KB Created: 2021-04-15 12:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: df3b8a744916ef93f43912596ba6a9e4 SHA-1: 71ca3eaf089f0d89f803d832b6099bbf7b5510ab SHA-256: e716ea75879aea01ae928412a8becfdb1979386b25a6c19eda71b67fd09484b8
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 0.9994

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://druttle.ru/strik?utm_term=hp+probook+6540b+review PDF link annotation
    • http://voicebftyi.com/91344190124vzg2q.pdfIn PDF document text
    • https://cdn.sqhk.co/wapevenupu/sS8hcjb/zelegevugu.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/gaspard_de_la_nuit_aloysius_bertrand.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/fXhhif1/kedorowenotu.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/81372478873.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/61578886865.pdfIn PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/economist_september_2020.pdfIn PDF document text
    • http://premial.su/ravixeruvosutbem59.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/kvVUzje/xuxawone.pdfIn PDF document text
    • http://drovazvenigorod.ru/warogaxigujasajitiro1kjlg.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/c2EdMBf/wheels_on_the_bus_chords_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/gi0ijh3/free_animated_video_maker_for_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/ahmpID8/marvel_superhero_creator_free_online.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/af2f740f-a562-4e91-8fdb-0f9dab8d1838/new_moon_book_cover_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/52837792336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa77eed6-2924-4766-a4f6-ec07fa8f43a9/94815612345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ad7b00-3056-4c71-b144-cc94e379a1be/sofugunimijuki.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/graco_relay_jogger_travel_system_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/66812824354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6d286e-713d-4bea-aa59-f8c2859dd3e1/odd_thomas_trailer_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/reverse_cable_fly_form.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/balance_sheet_classification_for_debt_investments.pdfIn PDF document text
    • http://xepuzakudera.atwebpages.com/protein_chart.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_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 5220 bytes
SHA-256: a3b944384786cdfaed3530f34fbc28de9574d1e0c8529231c950eacddf63d2f9
font_01_sfnt_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 10524 bytes
SHA-256: 6ff7db0b2af074e3061ccc2afa21a83e25c721cc764fbce6a16d83b12fb6ade4

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