Malicious PDF — malware analysis report

Static analysis result for SHA-256 860bd32e5704486f…

MALICIOUS

PDF

71.1 KB Created: 2020-11-20 04:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 94bc8718ccf7644167a7e6e97c16ca87 SHA-1: 92cc92cff2f3f7fc673950d4883d18cd43db87d8 SHA-256: 860bd32e5704486ffc347305580cc3acf27c2817eb6da22ddd782a5c12ab284f
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain product-related keywords, suggesting a lure. The presence of multiple links to disposable hosting services further indicates a link farm designed for malicious redirection or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=dewalt+cordless+air+compressor+20v In PDF document text
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/gotoge_rumoxobu_lizufulin.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/wabawopove.pdfIn PDF document text
    • https://fotekexilinita.weebly.com/uploads/1/3/4/2/134235887/pemenerigomup_lolonafeleke_warusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5fa9a3ad68a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_5fa985e9cb4e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f95e48818298.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/dutimezarudaj_fefib_birafa_rikaneruwu.pdfIn PDF document text
    • https://detagugijubofex.weebly.com/uploads/1/3/4/3/134365812/kivogowofe.pdfIn PDF document text
    • https://tobotegitemusir.weebly.com/uploads/1/3/4/6/134651307/sovifogukesovud.pdfIn PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/lisavagowez-xukevunej-kavijokanetap-kimumuvumogimo.pdfIn PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/bidavutixizofir-pesimugiwadubi.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/80b8fc0f-ac03-4b2d-b92c-1362ee831f3d/wusokujoziwodome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad72f2c-9b75-4fd7-a002-0ac886e341cc/82037779967.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_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 5644 bytes
SHA-256: 090abd84e27c7a7716e3fd12339a66d8042474cca02af3dc8ab0e537ede9d325
font_01_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 10664 bytes
SHA-256: 5cdd80cab51c9872f16d82a335f8dfbd7b949aa7daaa751034115a969ad156fc

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