Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae76bf51344ec0f…

MALICIOUS

PDF

84.7 KB Created: 2020-12-26 16:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 044dccb317b412763b202c618bcc1c7e SHA-1: ee673f223c30fb44c098778c1a0ef07b62839042 SHA-256: eae76bf51344ec0f355a25f4e0c633ea36ea31f6a5ad39f035901e8f8925afab
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, a common tactic for SEO link farms or phishing campaigns. The document body, though heavily obfuscated, contains text related to 'Kroll background check sample report', suggesting a pretext for the user to click on the embedded links. The presence of numerous external URLs, including one pointing to a potentially malicious domain, reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=kroll+background+check+sample+report PDF link annotation
    • https://cdn.sqhk.co/lotazoza/ifthdhe/bavim.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/8720332.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/4111619.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/id8Tr3a/online_multiplayer_games_with_friends_pc.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/temujonuwu/rerepimisafezowumumobute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f02cf6d-535f-4ac5-b8fb-41892fa56bbe/88375575141.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/hospital_discharge_summary_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/salewozazadukiromonu.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/banco_santander_totta_sa_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/rowdy_baby_video_song_mp4_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/fevilemiwopabekuzapiros.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/49009538826.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/camera_lighting_effects_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cbdc03b-81ce-4b71-9001-77f350fd9ff5/69735181394.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/89433663584.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/keto_tone_avis.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_off00010ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDF 5660 bytes
SHA-256: fc7fd09c6b76336d4fe46858e47ff66985675b96b93703c30c31d6fa10d53eb5
font_01_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 10916 bytes
SHA-256: cbf93601b915830faef03593d6e7ae95cc141518e6c86c7a192a4b616a5d69b2

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