Malicious PDF — malware analysis report

Static analysis result for SHA-256 f209a6547f44e8f5…

MALICIOUS

PDF

78.6 KB Created: 2021-03-30 10:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a6edb93b91969bb186f942ff32c560b1 SHA-1: d6e4a4f3560ba719336adc693fddc7ee6024b0b3 SHA-256: f209a6547f44e8f537a2ae400d0ec91ef502a493c158cbb597cfe58893394e6a
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 0.9997

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://pelibifir.ru/strik?utm_term=how+to+stop+behavioral+tics PDF link annotation
    • https://sevexuwajewedov.weebly.com/uploads/1/3/4/5/134508994/ritapajozufobenapiku.pdfIn PDF document text
    • https://nesojikav.weebly.com/uploads/1/3/1/3/131398336/rinog_giver_purogamuvuvi.pdfIn PDF document text
    • http://bopofefolinaw.22web.org/45991629220.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/razonafemol.pdfIn PDF document text
    • https://dobetabuzaduguz.weebly.com/uploads/1/3/5/3/135312815/wudunewirelas-tomerazej-fadurimamivugug.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/seporivexirudex.pdfIn PDF document text
    • https://tewagolefavir.weebly.com/uploads/1/3/0/8/130814187/pidarozubo.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/android_studio_installation_steps.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/4450495.pdfIn PDF document text
    • https://lufeziwupidel.weebly.com/uploads/1/3/5/3/135345985/489948.pdfIn PDF document text
    • https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/955672.pdfIn PDF document text
    • http://jujekokegolalut.iblogger.org/42934765536.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/rivugade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/pazugabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f008bf39-562b-44f4-becb-e4abb28c0082/pajutomuzu.pdfIn PDF document text
    • http://kusotuwomaru.epizy.com/simple_present_exercises_with_pictures.pdfIn PDF document text
    • http://sivelulowu.rf.gd/90942119884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6605736-b30a-4230-bb62-594971dd10e0/74646422006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2da2540-50b6-471d-83f8-bb3b4034f36b/rowe_ami_jukebox_repair_manual.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/41419139192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9af5d46-7a17-4f80-b249-e581deb16aca/do_complaints_have_to_be_in_writing.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_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 5276 bytes
SHA-256: c76d0d8740c2915a3654a5da167c70759e5ab93a01ef96824c0f5038ba71226b
font_01_sfnt_off0001098f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 10416 bytes
SHA-256: 5b829da557bd3dcb6d47dd9fbad927209305bd812dad02ed91f883d762f5b137

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