Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c1f1543fb2ba01…

MALICIOUS

PDF

59.1 KB Created: 2020-11-10 11:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bbbbd6e0162fa44dbbf14a32aeb836e6 SHA-1: c973a9f16b11dd6aff925dde4b1c4f5354ad48dc SHA-256: f7c1f1543fb2ba01b149951d8d71ac2b9447aa970eda35b2c087c3e137aa4334
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating a PDF link farm. The embedded URLs suggest an attempt to redirect users to external content, potentially for phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffnew.ru/123?keyword=velodyne+vbold+manual PDF link annotation
    • https://poxusesemeli.weebly.com/uploads/1/3/4/4/134462398/ramowimumiwi.pdfIn PDF document text
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/juxod_fazasefajov_magozatilebe.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/27c331a663.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/5058950.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/0c3f8e64-be92-4054-b858-0b006328da01/luke_percy_jackson_fan_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012ee6df-d1cc-4199-81a3-ba8147900dea/esther_reiki_alliance.pdfIn PDF document text
    • https://s3.amazonaws.com/felijaziremole/pipujekas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a2ff6b-2442-42af-b52a-c88879246bc5/citation_machine_apa_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b97031e-b097-44a4-8417-fb2fde4f75fc/akallarla_dans_1_full_izle_tek_para.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e290539d-12d0-43b7-9eec-c05849a505d5/molegosuwamatadewozadit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52479c8b-548f-4887-958d-03515420be5b/xumimemagulemikovelezoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccd9c84-d49b-46b9-ab76-f3bb978bc358/22505548526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1abd171-576a-4128-b0db-e00ccfa9e015/jazoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05a5cee-9089-400e-ba97-e83724242f33/windows_app_icon_pack.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_off0000ac1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1A 4964 bytes
SHA-256: 23e67b7a491e630803342e39cbdaddb21cbd4a053e21a10e91f0a271020b7b04
font_01_sfnt_off0000bcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF9 10288 bytes
SHA-256: 477d4bc79a99be5cfc19b14b7ba884e4b087c0f8bd8ec7219e61726f56acf4d7

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