Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a19b69d691b158…

MALICIOUS

PDF

77.6 KB Created: 2021-02-27 15:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3d192cab8dc51d3a16c5566ec83dcaa3 SHA-1: 060c0e5d4e7ecc9ba464d45f231dcbbfa3a51d10 SHA-256: d5a19b69d691b158865efe42e932ccaab2d9b00072093055639b889058c90146
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm designed for phishing. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is intended to trick users into believing there are new payment instructions, a common business email compromise tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://gimoguvi.ru/123?utm_term=plantronics+cs55+bluetooth+pairing PDF link annotation
    • https://cdn.sqhk.co/vijasezadida/ZbjhXja/match_3_jewels.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/didIInP/40476393379.pdfIn PDF document text
    • http://momsmall.space/african_languages_an_introductionlw8ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407571/normal_600db5bf48987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_6012639862482.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/heTmTic/slither_movie_1973.pdfIn PDF document text
    • http://morpeoplelife.ru/19544187403ukc6z.pdfIn PDF document text
    • http://tomandbxof.site/xujubizidizepobisobupuni55f.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/hgDoihN/18748545527.pdfIn PDF document text
    • http://static-start.top/where_is_the_battery_on_the_roombazkr9p.pdfIn PDF document text
    • http://naturebiolog.space/gout_guidelines_part_2qad4e.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/paxivogedewilu/panukisup.pdfIn PDF document text
    • http://rogasubuli.rf.gd/creed_band_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/savubuvixurew.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/highlight_duplicate_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/android_versions_names_and_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/93973026760.pdfIn PDF document text
    • http://lebofimuvi.rf.gd/does_teresa_die_in_the_death_cure_book.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/toefl_writing_task_1_sample_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/why_we_use_chloroform_in_dna_extraction.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 5460 bytes
SHA-256: d4c01ac88a819f0dbaf40b5a5fac295926d950defefcb6f1effcf35e1511ef0b
font_01_sfnt_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 10608 bytes
SHA-256: 87019e79f8645716ac3caaca7ee7e73620919aded8d19b87dc18ffcc91f6e9c5

Open this report in the interactive analyzer, or submit your own file for analysis.