Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d0660c82f89021…

MALICIOUS

PDF

77.7 KB Created: 2021-05-25 03:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0bbbf614a7234147ed1c25b502511af2 SHA-1: 2a9dc1cfa4eccf33cef7ba69c830170b071514bc SHA-256: 63d0660c82f890214bba0ce40b3bc8bd75f0b49f50f861499c99976a166e9742
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to iPhone passcode resets, which is a common theme in phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://druttle.ru/strik?utm_term=how+to+reset+iphone+6+without+passcode+and+computer+and+itunes PDF link annotation
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/9167452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_60009f64bc6ce.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/500beb1.pdfIn PDF document text
    • https://jekakakum.weebly.com/uploads/1/3/0/9/130969489/c0fe4b0ab5.pdfIn PDF document text
    • https://saxenivimagi.weebly.com/uploads/1/3/0/8/130813604/8400764.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/kotozawogokodef_belef_pejebewani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fca0b5280222.pdfIn PDF document text
    • https://wuneregogituweg.weebly.com/uploads/1/3/4/6/134686440/xilumef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470968/normal_5fc5f582ca291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_600e9cb137c95.pdfIn PDF document text
    • https://kinofipu.weebly.com/uploads/1/3/4/7/134725163/pojabawarev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_60121811c6832.pdfIn PDF document text
    • https://jikomaviwibu.weebly.com/uploads/1/3/4/3/134365837/d0823413ef7a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_604c9e3cecd62.pdfIn PDF document text
    • https://sinujezujano.weebly.com/uploads/1/3/1/6/131606051/bexuzevopujisoxisazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_6043870035a54.pdfIn PDF document text
    • https://noxesole.weebly.com/uploads/1/3/4/6/134615833/gevego-zuxifoxozazesif-wikudar-gopeb.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/6c09de78-4b96-4d3b-8f1f-3f9f859a38a6/how_to_change_radio_station.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a36e08c-2345-47c7-801d-a7cca889dd91/jigutisuxezuregali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48500158-9f5f-47a7-a036-dc0f2f6a7323/what_are_the_4_problem_solving_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3cffd7-8e22-47d4-b254-38928671d89a/panasonic_phone_silent_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c5444f-bf5d-4092-b8a9-ae398791235b/91853403675.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_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 5488 bytes
SHA-256: c3888acadc05cda47d77f2767b1e384749ce289a8f12df35e130bda7c59d40dc
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10600 bytes
SHA-256: 986c2452f96bc685c3d79d3c2fe4baaaea6ec6247154140d901eb543bcdbc98c