Malicious PDF — malware analysis report

Static analysis result for SHA-256 7153e712259a4a48…

MALICIOUS

PDF

66.5 KB Created: 2020-12-06 23:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1aea8655d35d7d2d4eb2a73aa70a07b2 SHA-1: ba16aa74cfe9738f55250b4130cd166b6764a475 SHA-256: 7153e712259a4a48a1b12742abf3a1899c14a43cdf51a609d09b9b25135589e2
156 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 0.9998

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
  • 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://trafffi.ru/123?utm_term=find+local+women%2527s+football+team PDF link annotation
    • https://sijanobodebalu.weebly.com/uploads/1/3/4/6/134639398/geluz.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/f68b171e-7420-437d-9f34-4904debd2307/james_martin_middle_school_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/acids_and_bases_experiments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedd3b12-50fe-45e4-afab-ef39b9072c88/the_meditative_rose_location.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/kidap.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/bisacodyl_davis_drug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553dd600-2846-44d1-afd5-346918d3a9be/5671176098.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/romeo_and_juliet_act_2_reading_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/2280037773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8abc49-702a-4280-8267-e2f0d67c9f68/27771766577.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/auralic_altair_g1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/rockstar_movie_remix_songs_free.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_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 5292 bytes
SHA-256: 3628df75cb56f94cbd93f2b1689a606fc30cba477a5e4fc3a7c17e5c9a95c823
font_01_sfnt_off0000d80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80D 10924 bytes
SHA-256: 74473540dd2ad0d1a9654a0138e92cb40a1f50e1b3a7cd53453aed948a8b1123