Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecae1c6e1281a42d…

MALICIOUS

PDF

73.0 KB Created: 2021-06-06 18:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: abd9ac84243116da308874654848f80c SHA-1: e63019360f0ac0b8a3733a84710e4ed95b4df66b SHA-256: ecae1c6e1281a42d12224c8c1df40b74efb8b759fb3b6c006b84683103cb114f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware. The embedded document body text mentions downloading a DLL for a game, which is a common lure for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://archism.ru/pbw?utm_term=download+d3dx9_30.dll+for+pro+evolution+soccer+2013 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503617/normal_601e12a374d3e.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/mixawefop_malokutibasono_wirifujunop.pdfIn PDF document text
    • https://nisewoji.weebly.com/uploads/1/3/4/2/134266574/01150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5ff1951cbff59.pdfIn PDF document text
    • https://popuverixi.weebly.com/uploads/1/3/1/4/131438274/pelofoka-ximudolez.pdfIn PDF document text
    • https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/lojejakojek.pdfIn PDF document text
    • https://savipamezixu.weebly.com/uploads/1/3/4/6/134673646/jawifud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ffab0aed8ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_605c5feed7256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_603a17e0199df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_602c597ba2801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485800/normal_5fdd5b563a047.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/6305c90b-acbe-4815-9f8d-385530a9cd21/audio-technica_at-lp60x_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2136456-3a01-4c84-87cc-dbf3f0fdf023/93843909865.pdfIn PDF document text
    • http://febamizilaw.pbworks.com/f/joruwuwodukege.pdfIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144622125/d2_lod_merc_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6d024b-cf42-419f-be33-ac2ec4c357d6/vutojibotodagur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0816f37e-f6ad-4381-b1df-3c3d819410c1/sataguwowefarosizeduz.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/how_to_breed_mythic_monsters_in_monster_legends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53de86b7-c600-4c74-9d56-f95e05455d73/pretty_little_liars_books_in_order_to_read.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_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 6076 bytes
SHA-256: 70e92fad77809371bcd202d115d4b571db20a6387ac1dcf9e78d368fa72f54cd
font_01_sfnt_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 10668 bytes
SHA-256: 86f50a64c5ecbb59c94142372b7d5a34c9fa9263f6e4fccc71f33d5dddee21e2