Malicious PDF — malware analysis report

Static analysis result for SHA-256 532f6d620fae0182…

MALICIOUS

PDF

82.6 KB Created: 2020-12-15 11:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f9fab8b9ccf7bb536f348a67d7cbc34 SHA-1: 73206e10aff2384c46c67da6f7a789b759637780 SHA-256: 532f6d620fae01828cb08cb4233ed8a1c4920ef5f14f5dc83c088becc3a10444
264 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate it's part of a link farm designed to direct users to potentially harmful sites. The presence of a callback lure suggests a phishing or scam attempt, aiming to trick users into interacting further. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • 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://traffking.ru/123?utm_term=coleman+pulse+1750+generator+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5f9049d451111.pdfIn PDF document text
    • https://zamizugupaf.weebly.com/uploads/1/3/3/9/133999186/720226.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fcaacdd5d792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5f984113ea36d.pdfIn PDF document text
    • https://kitovipafabezed.weebly.com/uploads/1/3/4/6/134600887/ab9a02729463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f9cf5ecd5e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5fd7c192057d7.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/d25bd313559ad9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7065b382bec7399f51dd2/t/5fcce6356f0099009e63bed5/1607263799426/little_learners_child_development_center_hackensack_nj_07601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f22d9fa-f00f-434c-93e1-174d1757446d/tinazetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1556f0b-f6a9-4417-9c9d-ace3150d7a58/yamaha_r_v1105_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/32749216232.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/65000692239.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_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 5444 bytes
SHA-256: e41a40fdf78cab48f23bdaddbf20ef12042807574193a949bd9e342ad28e5097
font_01_sfnt_off00010861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10861 17264 bytes
SHA-256: 0bc6f327a38bab7a98f3cfdf92b8668e618a2615c7810748f26057265399e18c

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