Malicious PDF — malware analysis report

Static analysis result for SHA-256 699ba883d5ed1fa6…

MALICIOUS

PDF

87.6 KB Created: 2021-05-29 16:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63f3fd6804ae9e3898a19aa0cfa5f5b9 SHA-1: 16cc5cfe0ba65f6677baff443aabd0e3b00e3847 SHA-256: 699ba883d5ed1fa62dadb9189a1a3ae4a36026ea7424811c85907b2341d0072a
186 Risk Score

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-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://jacksth.ru/strik?utm_term=race+to+witch+mountain+hindi+dubbed+480p+download PDF link annotation
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/2436230.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/vewirekizemalek.pdfIn PDF document text
    • https://vizavidonase.weebly.com/uploads/1/3/4/0/134040461/ladugagava.pdfIn PDF document text
    • https://robevumike.weebly.com/uploads/1/3/4/7/134767989/zelumataxexu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_5ff68997cbab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_602f58b94f41f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_6015ebe69927c.pdfIn PDF document text
    • https://rufuwoja.weebly.com/uploads/1/3/4/7/134735928/980301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_602455cf7c35d.pdfIn PDF document text
    • https://xojujafu.weebly.com/uploads/1/3/4/6/134633902/mupofum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_606d62229bedd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_600f45db65f70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470408/normal_600497d579c28.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/1301360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485703/normal_606b4ebc111cc.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/vunaloxefir_vivisubomu_gudulup_sasilezizivagon.pdfIn PDF document text
    • https://bojozavo.weebly.com/uploads/1/3/0/7/130740433/b00e3c52da11e30.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/logoxa_nilafut.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/98693651-be68-4a17-af6d-f321afd0a763/what_is_the_best_online_interior_design_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1636594f-3fd5-4844-a6e3-16b26ea0ec89/50819836390.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_off0000ffbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 5704 bytes
SHA-256: b357945bbc1f7580882ee9022722379c7a4e0ec2616b5981e3a73716e4e79e2d
font_01_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 11808 bytes
SHA-256: bc6c26e45f32c2b4a003dc038048bf9380e0d24dd6dd45f11c762216a04f332d
font_02_sfnt_off00013bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC5 16060 bytes
SHA-256: 245b106bafb5f7b974d9b536baca1fd5b70b5a56c91d3379d5016bbcc58c4bac