Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0b9c0e116934cd…

MALICIOUS

PDF

74.1 KB Created: 2021-05-28 22:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a2e902faae68b86e5e9bff50ed67b585 SHA-1: 94f54248c1adb051226602c3d8ae5cc98c9eb8aa SHA-256: 5d0b9c0e116934cd9484a329533c70073fab9c275a11ef4a3ccb44baf0c3b517
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://golowaki.ru/strik?utm_term=how+to+connect+honeywell+home+thermostat+to+wifi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378410/normal_604f23da5e3a2.pdfIn PDF document text
    • https://bojozavo.weebly.com/uploads/1/3/0/7/130740433/1641227.pdfIn PDF document text
    • https://bigudiwox.weebly.com/uploads/1/3/5/3/135304820/4401927813.pdfIn PDF document text
    • https://kofetasug.weebly.com/uploads/1/3/0/8/130874362/4983479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464865/normal_5fd66f5c85df7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_6052eed86e7a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427268/normal_5fe44b75364da.pdfIn PDF document text
    • https://mufosuxid.weebly.com/uploads/1/3/4/0/134040625/xutef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466673/normal_5fdca573cac2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_60612b1fd91d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_6038c2d5ce041.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4390095/normal_60affbe32296d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_60393e0d7b26f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_602d40844c768.pdfIn PDF document text
    • https://jeralizijofuki.weebly.com/uploads/1/3/4/7/134710598/sidojimosodol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_605bc4f151483.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/0fb80272-068a-4562-8de9-64be18905361/31200750187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d05f481-e7c0-47be-aec0-b8a607f03832/what_colors_go_with_navy_blue_shirt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94aee58-8969-40a5-90d9-12a86cfd5013/how_to_check_a_business_through_the_better_business_bureau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f740b5-901e-4866-9d71-6e244a9bb896/troy_bilt_squall_2100_electric_start_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e454877-edd7-42fe-a94e-5f9a17f145b1/rixefugop.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_off0000e4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 5276 bytes
SHA-256: 3cf31bad375e1fcab948012cd55b4e7208a605fd8b448c3fd72aeb0f19a101e2
font_01_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 10472 bytes
SHA-256: 4b16eac83e08ecdfe577fd63741e8a8bd22446a2350d60319eb26934fff42946

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