Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e699a92fb382ae…

MALICIOUS

PDF

93.8 KB Created: 2021-02-20 13:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0b9d21cfbead8481e0b84e4547ac364b SHA-1: bd6ea8b7cc7c52cba0c456c697173c4117a8c0d5 SHA-256: 74e699a92fb382ae0e9c964241538188bcc49a0c03ed67226b84b696ea5431e9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to disposable hosting and a known malicious redirector. The primary purpose appears to be to lure victims to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=plate+boundaries+worksheet+with+answers In PDF document text
    • http://ryursew.space/74992366887reb36.pdfIn PDF document text
    • https://wafifeberir.weebly.com/uploads/1/3/2/6/132682897/85fdce55a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_602daeb6d42f3.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/204f8a943f5054.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/vuxagaguwu.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/heciba5/game_of_kings_the_blood_throne_showroom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_60288d91153e0.pdfIn PDF document text
    • http://ufenmac.com/carr_is_google_making_us_stupid_summaryybs2q.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/gk6Xhcd/63965724996.pdfIn PDF document text
    • http://samo-katim.ru/pozekos5z6ne.pdfIn PDF document text
    • http://1xbet-registrat.site/engineering_calculation_paper_templatetoiuf.pdfIn PDF document text
    • http://cookwellbakewell.com/landmarks_in_humanities_gloria_fierosa4sf.pdfIn PDF document text
    • http://globalsafegroup.com/install_android_tv_di_pcp3olb.pdfIn PDF document text
    • http://kukushpa.fun/jewibajarosixurofobaw9p5c.pdfIn PDF document text
    • http://aycotoro0.xyz/legend_of_heropolis_mod_apk_unlimited_moneys9k7z.pdfIn PDF document text
    • https://cdn.sqhk.co/foxenikap/zXidZjc/snow_racing_2019_horse_cars_snowmobile_race.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/7446492.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12899 5092 bytes
SHA-256: e68055c6674b5e3d96bfc5c6142db42b46c8853dc10ae379dd582a5259ec5e5c
font_01_sfnt_off000139e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E0 9808 bytes
SHA-256: 5bba03ab6c6d373a6d3d989de985ca340f00b47734657a81735b5c8e0837bf46
font_02_sfnt_off00015b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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