Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e70e8d800b4790…

MALICIOUS

PDF

102.5 KB Created: 2021-02-27 10:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 44cddc16871308b24e1c6abc8cc5f45f SHA-1: 44a360b94e49f295103cef4a029e860537eacde0 SHA-256: 93e70e8d800b4790a4abacab893834625856ef7614958852e10380bcaa36b9ed
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily corrupted, suggests a lure related to a 'power inverter manual'. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=bestek+1000w+pure+sine+wave+power+inverter+manual PDF link annotation
    • https://cdn.sqhk.co/sebidurubuze/jd07ggj/free_homeschooling_programs_near_me.pdfIn PDF document text
    • http://sedouche.xyz/how_to_open_a_white-rodgers_thermostattmmsi.pdfIn PDF document text
    • http://repochka.site/fallout_shelter_room_sizepue7v.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/gefokevit.pdfIn PDF document text
    • http://phrensy.co/cake_dowel_cutting_tool08i7c.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/5963371.pdfIn PDF document text
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/7565840.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/XibhjT4/beautiful_flowers_wallpaper_for_iphone_6.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/8776001.pdfIn PDF document text
    • http://help-nanny.site/anatomy_and_physiology_exam_1f60p2.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/c32fa896.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/15695561971.pdfIn PDF document text
    • https://cdn.sqhk.co/padumaxifop/jnUtqhe/raid_shadow_legends_pc_auto_clicker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_603236027bbb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5fe0c33cc179b.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/ipod_nano_3rd_generation_case_with_belt_clip.pdfIn PDF document text
    • http://storeeuro.info/loxamoririporizefulolertlva3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_602d82a46da8a.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://s3.amazonaws.com/dazifozixawus/tuzuvexogixejaxora.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/4833340280.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 5308 bytes
SHA-256: 34be34fa5128794cabcc29f216ea72a09091c1ac8a755e5443dda2dd98d3257a
font_01_sfnt_off00013b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5B 14300 bytes
SHA-256: da6e75d31fb60381e48706d0a589da6ce63e3e63a8d415b524ac40493dbf941a
font_02_sfnt_off000168dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DD 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd
font_03_sfnt_off00017dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DD6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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