Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ae0eb554327cb4…

MALICIOUS

PDF

65.0 KB Created: 2021-01-03 11:35:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c0168d7c3fd34e4a97e7e763d6c4b1e9 SHA-1: 15ffe9e0083c499a01d37022fd506479f98ec0b2 SHA-256: d7ae0eb554327cb458795609d725ffb5eebf7fa1065f7a71a25dfe33ee2c08dc
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to 'intensive pronoun worksheets 6th grade', indicating a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/aws?utm_term=intensive+pronoun+worksheets+6th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fab58d05e776.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/xhWjdjf/how_do_you_freeze_pumpkin_pie_filling.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_5fdb52197b248.pdfIn PDF document text
    • https://cdn.sqhk.co/domuzusud/pPih1sN/create_empty_list_in_javascript.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5fd159cb2d6a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fc9297704ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fbb8ce690f76.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/6souham/hobby_bird_of_prey_call.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5fc4d282f1738.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/Oidgz4I/fist_of_the_north_star_ps4_mini_games.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/ghfdAq8/new_punjabi_sad_song_ringtone_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/ieCKNgc/davarubore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fd2dfe564008.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/lorifawuvawot/70776973397.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/wodano.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_off0000c0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C7 5496 bytes
SHA-256: b8cb6ae160ad1aa8b471b1d7b61d74e08a78f8da0c7a911ec4be8f84736ccf8e
font_01_sfnt_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 10416 bytes
SHA-256: e975ca03490a93baa1ed0382879f02a328844060335c8a4c3294d218726101fc