Malicious PDF — malware analysis report

Static analysis result for SHA-256 68afb39040c16ae3…

MALICIOUS

PDF

86.8 KB Created: 2021-03-22 11:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dceb8dbd02578e5d33ef889a405a354b SHA-1: be573783ac2c1aaf9bfaa6b5297f376a53eb2b5c SHA-256: 68afb39040c16ae3f33e237df3a0539fcb8588073af75676fb82a34fe4c0843a
146 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and a callback phishing lure, with a high ML score and ClamAV detection for a phishing trojan. The embedded URL points to a suspicious domain, likely intended to host a malicious payload or phishing page. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to trick the user into clicking a link for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=police+report+for+stolen+items PDF link annotation
    • https://cdn.sqhk.co/rogazume/gIJojbh/gowumilokusizamigazib.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/reading_level_to_lexile_level_conversion_chart.pdfIn PDF document text
    • http://jitaguzo.22web.org/mcgraw_hill_wonders_3rd_grade_spelling_words.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/eJHvhfw/mobile_heart_wallpaper_download_love.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/sipogebuv.pdfIn PDF document text
    • http://bubiver.iblogger.org/english_common_words_list_with_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/WJTpjdZ/99560419136.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/Tjajxgh/ezpay_login_lakota.pdfIn PDF document text
    • http://derewopenila.22web.org/area_of_circle_proof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b960f889-3ac9-4655-b520-2fe34a0a9c3c/system_analysis_and_design_project_topics.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_5964fa4f34504aeea710acf8bd86b77a.pdf?index=trueIn PDF document text
    • http://varirojemixu.myartsonline.com/frontline_magazine.pdfIn PDF document text
    • http://wesonujojamoga.epizy.com/post_mastectomy_exercises.pdfIn PDF document text
    • http://nozaleb.rf.gd/wow_fishing_gold_making_guide.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/mijuwamujuxonirorenebapod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884d026f-4dd2-44c4-8700-d9930a332a66/libro_azul_autos_usados_2019.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_394438adc4644c59b33d606895763439.pdf?index=trueIn PDF document text
    • http://bijalefopate.rf.gd/henri_cartier_bresson_the_decisive_moment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7e2da0-edaa-4f2d-8b4a-4c73080dca0e/how_to_improve_your_mental_strength_in_golf.pdfIn PDF document text
    • http://dakiwadizadenig.rf.gd/backlit_signage_template.pdfIn PDF document text
    • http://numozuxoputani.rf.gd/butovujepubuxamogi.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_41b65d7d8383437283d8924defcae1b6.pdf?index=trueIn PDF document text
    • http://dosusixajamatef.rf.gd/ethiopian_airlines_crash_report_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78399f14-a779-4fe6-8a03-5694123ef275/lofujozojuranoruwoxux.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_cd2db05fc0db4f7bbb6f9cadcaca76cc.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 4940 bytes
SHA-256: 97b178528ead4c37ec460d6a94b1499d89b83d9b96f0bdcccf2d48b901fc1169
font_01_sfnt_off000108e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 4740 bytes
SHA-256: 0eb899e74b4e61d13f1af48950a80186f0928ec7d261308339dada7e9d5b3516
font_02_sfnt_off000118d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 11396 bytes
SHA-256: ec2a31f49d34d378e17d4e351dcd20ebd0eae07e31f547f5d70f9eacf454807a
font_03_sfnt_off00013f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F49 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176