Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa875d6c585a7936…

MALICIOUS

PDF

83.5 KB Created: 2021-02-26 10:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: afeb66f16e93c18b55db8663b0dd4d9c SHA-1: ee29f729d9ebbb4cf729f476dceafc183f8328fe SHA-256: aa875d6c585a7936dab719ed74caac192d812489b050d0b3c1809ab7e2eae3ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wb?keyword=how%20to%20start%20fo4%20dlc PDF link annotation
    • https://cdn.sqhk.co/kominepoli/iaihehb/galaxy_attack_alien_shooter_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/daxonotetil/hib9tja/chocolate_cake_cooking_temperature.pdfIn PDF document text
    • http://gnoogle.site/cursive_writing_template_makerj41yj.pdfIn PDF document text
    • http://redpandarecycling.com/kapoligesupidevajovugbqu.pdfIn PDF document text
    • http://faketikus.22web.org/78695412697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_60311f36bc703.pdfIn PDF document text
    • http://flowerport.shop/how_to_read_act_ffxiv0d2cy.pdfIn PDF document text
    • http://begemot.space/peppa_pig_toys7uawr.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/Jjjhbid/37547384497.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dp2lkjN/best_free_video_maker_for_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386609/normal_600907d6e68be.pdfIn PDF document text
    • http://legendbilisim.com/20756091856t8zjs.pdfIn PDF document text
    • http://thecet.xyz/how_to_make_a_charcoal_drawing_not_smudgejqvzh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469847/normal_5ffd6e486f3cc.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/sorogamat/cadet_college_pasrur_admission_form_2018.pdfIn PDF document text
    • http://kajalefaruw.epizy.com/basketball_offseason_strength_and_conditioning_program.pdfIn PDF document text
    • http://lojuvep.epizy.com/rixinigaxenemedozawasidop.pdfIn PDF document text
    • http://ripeterub.epizy.com/ccleaner_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/xofuvud.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/nitinuvamumezizoviviban.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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 3076 bytes
SHA-256: 846bad35580dabf0cde73bfda84bad59486174de6e3e97ba2eb656b75b670860
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 5156 bytes
SHA-256: 41371c337616f127afb85a32649e7f15c10332ee88ee3b8188c0a55640ec53bb
font_02_sfnt_off00010336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10336 12320 bytes
SHA-256: c19ee281e790c57c12506e570058163b6dc1ead24b66a1c0085ca2390a1e4dbf
font_03_sfnt_off00012b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 16084 bytes
SHA-256: 7851fffef52e473cda661ca30cfe3df526f3fed1248a67fb10825064e0e4480f

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