Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3dd940abb30dd1…

MALICIOUS

PDF

66.6 KB Created: 2021-02-14 04:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 44193568032807cffcf48dc7007788d8 SHA-1: 2963f382029771a7722a2a0a512084fabe70cb51 SHA-256: ae3dd940abb30dd139be893e6430d631a7a870203ccb360d2a5990d3726894fd
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=personajes+de+la+revolucion+mexicana+para+colorear In PDF document text
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/6224953.pdfIn PDF document text
    • http://boothattendant.com/ladikofomufekwynkf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fd175cd5bcec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ffdb9881d6f4.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/53132c8bccf0505.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/wimodab.pdfIn PDF document text
    • http://goproits.com/exercice_pronom_personnel_cm1__impr3x59r.pdfIn PDF document text
    • http://belldiscount.ru/fobixomuwh9ewj.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/mapirafof.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/c6659ddec545c5.pdfIn PDF document text
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/4847707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_601de64d296ff.pdfIn PDF document text
    • http://ezfix.asia/ilford_fp4_plus_sheet_filmqbffb.pdfIn PDF document text
    • https://mitivowa.weebly.com/uploads/1/3/1/6/131607237/zazevir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_6024c2752d08a.pdfIn PDF document text
    • https://vagafanuwojuxiv.weebly.com/uploads/1/3/0/7/130776749/7677073.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/dutimajizowa/zawedaruma.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/ejercicios_movimiento_rectilineo_uniformemente_acelerado_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/vepubewufoduvinas.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_off0000c430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC430 5424 bytes
SHA-256: afd51f1f8c59c62e5d2ea78ed35e5462b29b720bf97f6733a8be3dcc7d27deaa
font_01_sfnt_off0000d697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD697 11372 bytes
SHA-256: 31a943d8b6b1b725d5ed9d2680c144a7746ff8fb5c373c959647f8702a23eede