Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcabf2bf80b4f18d…

MALICIOUS

PDF

74.9 KB Created: 2021-04-15 02:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 57371e5069d0fa40d3b32c4891d2625c SHA-1: c209b5d227fb22a340f46796f865302562e50ca1 SHA-256: fcabf2bf80b4f18db720c71a3b474d7bce38919e88038f66092773376960ad18
146 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure and a link farm, with a high ML classifier score and ClamAV detection confirming maliciousness. The embedded URL 'https://leonvi.ru/strik?utm_term=53+bank+business+login' and the PDF link 'http://secureappeal.com/kaxirudateletuktvdc.pdf' are identified as primary IOCs. The document body, though heavily obfuscated, suggests a 'bank business login' context, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/strik?utm_term=53+bank+business+login PDF link annotation
    • http://secureappeal.com/kaxirudateletuktvdc.pdfIn PDF document text
    • https://redobalopubijav.weebly.com/uploads/1/3/1/3/131380120/ea29dfce9e1d.pdfIn PDF document text
    • https://zamigalimigarub.weebly.com/uploads/1/3/5/3/135326483/boriwarebinozu_kinudoridi_sopivuvuzofu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449965/normal_5fdda44fc8788.pdfIn PDF document text
    • http://vivadoctor.ru/is_the_lying_game_on_netflix_2020zfz3v.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/noloj.pdfIn PDF document text
    • http://easycreditscore.info/vijamibogokigufic3vef.pdfIn PDF document text
    • http://igbusinessabouthelp.com/squence_danse_cm2za6rh.pdfIn PDF document text
    • https://wibakaxidame.weebly.com/uploads/1/3/2/7/132741334/8b4db66a5a14.pdfIn PDF document text
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/6236076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_60034640dc4ff.pdfIn PDF document text
    • http://trendmobile.ru/what_is_the_difference_between_an_llc_and_a_subchapter_s_corporation0v7w3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_606bdc03dbd89.pdfIn PDF document text
    • http://craftsmansmetics.com/nurinaforatovulubezojtz18.pdfIn PDF document text
    • http://podarokinsta365.site/297696884344elsx.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/eced2bd5-ea03-4ff2-98be-f408586ffc4e/98295999453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77f2682-5805-4fbd-8f3d-8bdaa15851e6/gopupupofukojasuzutoveto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14ce4ab-8304-422a-96b1-785fe385b269/gumiwudevirujagadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a794c144-ac7a-44ac-80ac-fe33ba034fed/plato_books_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8e2ff2-c28d-4a83-b80d-9a657b4e1116/fossil_q_explorist_gen_3_not_charging.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_off0000e494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE494 5152 bytes
SHA-256: 736234ae8bd69be32df9ebf76d93e93c3f56881e65ba847d0b242a9762cfb5dc
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 11440 bytes
SHA-256: e01cb5f24b3b0e6128a6a92149ab8d71a55e1c9de15c69fa37bad8796494060f