Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f0844ae6ab9141…

MALICIOUS

PDF

131.5 KB Created: 2021-03-10 20:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e984f47ba8b001833b3c959ce18166a3 SHA-1: 2b99cd236946fc6e929e85c7cd2a631f802d80be SHA-256: e9f0844ae6ab914176f34aa0406f6596c7d2ef9a3bc858b0c234e1eac26e4a71
206 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/123?utm_term=sony+cech-+zed1u+manual PDF link annotation
    • https://cdn.sqhk.co/togokitaz/hfgjSib/outback_rabbit_hutch_castle_with_run.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/9ichhih/8938109207.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/VShbjjp/nicki_minaj_songs_2014.pdfIn PDF document text
    • https://xixolediz.weebly.com/uploads/1/3/4/5/134513169/lutijexum.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/hlWCnhi/puzafoxovixowutakez.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/finghhj/58879684101.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/awol_guidelines_philippines.pdfIn PDF document text
    • https://pajilolupifi.weebly.com/uploads/1/3/2/3/132302794/8bc2c7d22eac.pdfIn PDF document text
    • http://pobumur.iblogger.org/jibedakadexejijiwixe.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/kuvudevavulo-bagovizata-folikogosobo-jaxinedawegenun.pdfIn PDF document text
    • https://cdn.sqhk.co/worekoxe/HhieLjd/i_want_to_be_evil_eartha_kitt_karaoke.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/excel_sheet_online_login.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/aieie4h/66053881480.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/bubisifapagefe/california_dmv_forms_dl_44.pdfIn PDF document text
    • http://bezakimodetores.rf.gd/50172296466.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/brother_conflict_ova_sub_indo_mp4.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/funes_dos_anticorpos.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/56699416129.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/68685505387.pdfIn PDF document text
    • http://makowadoka.epizy.com/bhumi_movie_song_ringtone.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_off0001c417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C417 5244 bytes
SHA-256: d47fc8eac8bf7590a35a1de7d7568219f67e9e4129ef7ccb9c1a16e85ff0fccc
font_01_sfnt_off0001d5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5E6 13204 bytes
SHA-256: 161716fe55ce5a05fb8464fe65332e8749312685ac68a8657e56d43e3bf45656

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