Malicious PDF — malware analysis report

Static analysis result for SHA-256 320630bf09d2a221…

MALICIOUS

PDF

90.2 KB Created: 2021-01-16 16:11:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4947d71465e7b0e0b4aadb2b211b5f7e SHA-1: d7d0fcf0d6b6153a5ea9eb3ed1f15c4766b863de SHA-256: 320630bf09d2a2216a9ccf14b82273fb409709771198615f426d26e309d344ca
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lead users to phishing sites or download further malware. No scripts were extracted from this sample, but the link farm structure and malicious URL detections are sufficient indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=the+ultimate+guide+to+price+action+trading+pdf+rayner In PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/5468c8b5ffe.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/dbijiiR/ruxonitugotasubudogaze.pdfIn PDF document text
    • https://pitiwiju.weebly.com/uploads/1/3/4/6/134687602/dekujes_zunimibipugebef.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/xidazunis-lazile-sasizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_5fba23c91848a.pdfIn PDF document text
    • https://kuxiwapanipajof.weebly.com/uploads/1/3/0/9/130969705/xiligotipozaravi.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8f24ebaa3f201f6.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/bRien3F/download_game_tactical_battle_simulator_mod_apk.pdfIn PDF document text
    • https://vuteduwezo.weebly.com/uploads/1/3/4/3/134336695/bizaj_tidodinonomez_dasuku_bizakapidugipof.pdfIn PDF document text
    • https://metonokosaza.weebly.com/uploads/1/3/2/6/132681587/zababed.pdfIn PDF document text
    • https://vajizekof.weebly.com/uploads/1/3/4/5/134594154/f3dcc1d2c91.pdfIn PDF document text
    • https://kezodedekupamo.weebly.com/uploads/1/3/4/6/134605888/6242762.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/f3eda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/what_have_you_been_doing_yahoo_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 5440 bytes
SHA-256: 51fe82b330048da5a8ca2bfba0e016920d48b5a631f214dbad526145051d209a
font_01_sfnt_off00012007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12007 10976 bytes
SHA-256: 91b36a1bf57adb3ee56c8dac86905865472a0b184e1acd464361b15056427088
font_02_sfnt_off000145dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DC 16196 bytes
SHA-256: 7279e17af1e02fd0f3ef997930705907ffabfba99e9efaabfaf00d6d06097595