Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec8ccc7c6d007ae…

MALICIOUS

PDF

95.0 KB Created: 2021-02-17 23:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 356eb6f53875788067343b8fe5700d5c SHA-1: 7fe8ff9c7550007f6076522976f6095ee65765bb SHA-256: 0ec8ccc7c6d007ae3ad5e59302dd32d01a8bcdb2542146ffaef10700c746ba53
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be part of a lure, directing users to a site that likely hosts further malicious content or attempts to phish for information. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

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 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://maypoin.ru/123?utm_term=is+hemoglobin+a1c+accurate PDF link annotation
    • http://magnifioco.site/who_does_apollo_end_up_with_in_the_trials_of_apolloce6qj.pdfIn PDF document text
    • http://bachanalytics.com/gunblood_game_hackedk7a53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_60091c7bb5735.pdfIn PDF document text
    • http://dabuxupufudina.22web.org/logos_quiz_level_30_answers_iphone.pdfIn PDF document text
    • http://dkmz2.club/tofemiwapikumubinununu91ent.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6017a2baf35e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_602880baec6b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_601649ef68182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409623/normal_5fdeca38ab6df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5ff12219c2e42.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/xezonijida/colors_tv_voot.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/reference_letter_template_for_internship.pdfIn PDF document text
    • http://rokalugafujat.rf.gd/77715234399.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/67486987341.pdfIn PDF document text
    • http://rebagada.rf.gd/iso_13485_audit_checklist_template.pdfIn PDF document text
    • http://xekuvazam.rf.gd/94916166696.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_off00013364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13364 5344 bytes
SHA-256: 84fc18494c91c02e39f924f7ddeaef41a272d673f5015f1541d87979f11db3a9
font_01_sfnt_off00014568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14568 12332 bytes
SHA-256: bdf611b058c06b2a963c7eacecc1f0c5ad8d5d8682774487b00f2c91d73de5fa

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