Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32f8287248cd560…

MALICIOUS

PDF

83.0 KB Created: 2021-01-29 04:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f0d561477a85e7dfaded07659940c04f SHA-1: 65854197966fb1398e1b80da55e640c53f2ea2c8 SHA-256: a32f8287248cd5608612b304f17eb163725d9ee166df44362e5d1990bab24465
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, several of which point to known malicious redirectors or disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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/wb?keyword=major%20mayhem%202%20game%20download%20softonic In PDF document text
    • http://xtrading.buzz/begivikajeco80s.pdfIn PDF document text
    • http://migerov.xyz/pukitelumosazeweki755wj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fcd3fd9b6578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fc6a45a913c1.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/Jidjbid/donanujoxudoxuvora.pdfIn PDF document text
    • http://rollernefrit.xyz/us_online_shopping_sites_for_shoesungab.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/bUCifhb/riboke.pdfIn PDF document text
    • http://fredo.run/85372521067divt7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483864/normal_6005d2a62fb83.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/jhifgE6/music_video_editor_app_for_android.pdfIn PDF document text
    • http://jilet1.club/western_manor_apartments_kannur69hcv.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/kubunokadiwasatevowifasutq9mp.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/383674540968jlfg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_600202915b6c5.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/RCJNhfm/bloomsburg_pa_population.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/ejhGm96/white_lemuroid_possum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/makumapikeze/when_we_were_young_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/la_java_des_bombes_atomiques_paroles.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/minegonakodivodo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F8 5632 bytes
SHA-256: 46b6ea292d4d8a51b5ed2b2bf8db3ec808f2f3825c2d4f24d7d5cbf4819d5ed0
font_01_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 10648 bytes
SHA-256: b23b037cb031f3377e587e24bcbe4b7cb54e5094b030054db6adf3d49581530e
font_02_sfnt_off0001305e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230