Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ab555f95184408…

MALICIOUS

PDF

73.8 KB Created: 2021-02-26 19:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af8df883e474d7673a6c7b0afa2713ee SHA-1: 5375a28ccd24bfaba56ee8a7c09f7364463306b6 SHA-256: f6ab555f95184408911adf8dbe1d98c2f1e34b13937640e8ceec403fd5579870
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains multiple external links, including one pointing to 'fokemale.ru', which is likely part of an SEO spam or phishing campaign. The PDF structure and embedded content suggest it's designed to trick users into visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/wix?keyword=wall+breaker+clash+of+clans PDF link annotation
    • http://kesenirevapovid.iblogger.org/xamiwovozezivuwo.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/bogaxatozuwuxaxuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_6014fe0a848cd.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/wopari/bosch_serie_4_instruction_manual.pdfIn PDF document text
    • http://suvowafavij.epizy.com/android_data_recovery_chomikuj.pdfIn PDF document text
    • http://nokakegobowu.epizy.com/products_formed_in_krebs_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/jalshamoviez_bengali_movie.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/calcutta_university_phd_registration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/vezepatorexatit.pdfIn PDF document text
    • http://rofixalo.epizy.com/bpsc_full_form_and_meaning.pdfIn PDF document text
    • http://pitidurafekuji.rf.gd/comprehension_worksheets_for_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/9171263955.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/tigojivujovora.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/84535449747.pdfIn PDF document text
    • http://bitediwufekoxem.epizy.com/induction_motor_control_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/head_first_javascript_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/hoyle_casino_games_2012_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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 5184 bytes
SHA-256: 2dad0b9fc0913bda538661470cf77e6ee7cf3d39574279aad2bb5cbb4b906db0
font_01_sfnt_off0000f721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 10240 bytes
SHA-256: 81dc747dc8e6a8458ea65fa87bab2881c968233821fc13bfa936d5db0380a5c1

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