Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba96811d11572cb…

MALICIOUS

PDF

74.1 KB Created: 2021-02-24 00:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a8f1620b563a9b6884391456c8f34c6c SHA-1: 49948b27d907a028bb2a7164b4d6322e796f361a SHA-256: 5ba96811d11572cbbefa564940a1b49a1a282bb1d62d19d9d5f475e1e0675163
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/wb?keyword=similar%20triangles%20worksheet%20answers%20pdf PDF link annotation
    • https://puzifisabu.weebly.com/uploads/1/3/1/3/131378936/1855139.pdfIn PDF document text
    • http://kufigada.22web.org/fungi_lab_report_conclusion.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/gubokotagitub.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/25d5a3a7.pdfIn PDF document text
    • http://italia-doc.fun/taller_de_escritura_creativa_berta_hiriarthqt2l.pdfIn PDF document text
    • https://xulewanexu.weebly.com/uploads/1/3/4/1/134108589/febapexasulan-sobetabimob-wokudik-dipij.pdfIn PDF document text
    • https://zomuguwiremadak.weebly.com/uploads/1/3/1/4/131406071/paxataxuzes.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Khchehj/togutesos.pdfIn PDF document text
    • https://cdn.sqhk.co/vosizijanad/ja0ZUS0/more_fish_in_the_sea_dating_app.pdfIn PDF document text
    • http://dostafood.xyz/amendment_to_offer_letter_template1zljq.pdfIn PDF document text
    • https://tagufonatudivar.weebly.com/uploads/1/3/4/6/134609106/6cba350d8.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/jehglib/sulogaruz.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/nisiwakoxutimowe.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/getizar/a_flying_jatt_sad_song.pdfIn PDF document text
    • http://fopupasefe.rf.gd/fazatezemikarapugulerunin.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_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 5716 bytes
SHA-256: 0dd2adf1a640ddfd1bae187077f4003eebf5d41a2daddde22c8566ac9576933d
font_01_sfnt_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 10528 bytes
SHA-256: 24f17c69a3ea6bef59eae211699b489b99db265c80d7fc6402ad10fdcd9183c9