Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af6430c866b8598…

MALICIOUS

PDF

73.2 KB Created: 2021-03-15 03:38:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6185fa46bb608127a42029303731257a SHA-1: cee20798e28c51a9ac14bc6416e66dc5160b6bf0 SHA-256: 0af6430c866b859874122e35312a9c9d26c386e3de7d46fba9a7cda0be652adb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded document body, though partially corrupted, appears to be a lure related to song lyrics, likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=como+te+extra%25C3%25B1o+mi+amor+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5feb7866aa08a.pdfIn PDF document text
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/d0f22f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_5fd2e6aebb9f7.pdfIn PDF document text
    • https://tipureroxagojox.weebly.com/uploads/1/3/6/0/136096040/8271825.pdfIn PDF document text
    • http://www.opentle.orgIn 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/059d86a6-3ad8-46a2-95b4-6e7e87f6ddcf/12027445105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda501b7-0d5e-4f11-a1c1-1777270b8224/94516738000.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_fee41060eeef47a5aeb9a327490637fb.pdf?index=trueIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_0f5bc428352643d89bf9dc70bc615858.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a068138-2ab3-4d47-a455-befc5f1c389d/welomowubutegi.pdfIn PDF document text
    • http://pukowevuvifa.rf.gd/fererarapojefebasetavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007d72c2-f3f0-47ce-b476-c855803de9b4/liwomuwumodu.pdfIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_f34135e625044b9b9f7de98c1320b6a3.pdf?index=trueIn PDF document text
    • http://mevedokepovi.epizy.com/muwidolefo.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_9a5cd9cf7a1b46a2b3df0edd459c981d.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_917248ce7b824de7960f29c076034770.pdf?index=trueIn PDF document text
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_96dca342658b4eaa9cc5e757652891ec.pdf?index=trueIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_cd72c245e2ca4818986d1fdbba001d51.pdf?index=trueIn PDF document text
    • http://nenenadixipuso.rf.gd/3m_manual_200_ml_cartridge_applicator_gun.pdfIn PDF document text
    • https://591379ed-26d0-4405-baa7-5b8dadede013.filesusr.com/ugd/866ffa_15d0128d7b804ae7934a5f43b9709b87.pdf?index=trueIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d9fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD9FC 7796 bytes
SHA-256: 811bc2c4a371cd3270e90ccbbc2149d0a92c35e801c0a8546d79d450c4b9c5bc
font_00_sfnt_off0000c88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88E 5232 bytes
SHA-256: e61a44e4bfb1429c6d6625d1db71f065e77f443e21bc531f7c744362d84c7a15
font_02_sfnt_off0000ef65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF65 11700 bytes
SHA-256: 261643cfbb54c1cec459413d942babddaacb345ae6fec8c9d2dea1aed522efd8