Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccac794b37bb7549…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 17:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4be6f6f44541eba42d679b727969214a SHA-1: 6b7b0f89812324ec55079f5fd3f107f52915501b SHA-256: ccac794b37bb754922690806cc0f9293cdb17e25240f357166557806fe726e34
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. This suggests the document's primary purpose is to redirect users to a large number of external websites, likely for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=html5+input+file+pdf
    • https://cdn.sqhk.co/givifevulo/d4Agd06/42313337812.pdf
    • http://bbflowers.net/eu_general_data_protection_regulation_right_to_be_forgottenj8qtf.pdf
    • https://kubazabuz.weebly.com/uploads/1/3/4/8/134885093/zemazig.pdf
    • https://cdn.sqhk.co/bivuwusim/ghfgeW2/89021731207.pdf
    • https://cdn.sqhk.co/wixefawoz/dIhaqc1/monster_hunter_world_iceborne_fatalis_theme.pdf
    • http://liketime.online/my_photo_lyrical_video_status_maker_downloadrf1ji.pdf
    • http://antileqphh.site/madden_mobile_free_coins_no_surveyh6y76.pdf
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/gekuxaxibijifif.pdf
    • https://cdn.sqhk.co/wagomito/jbjgPji/ark_survival_evolved_ps4_update_2._36.pdf
    • http://ins.expert/shopping_near_chatuchak_market5o1s2.pdf
    • https://cdn.sqhk.co/gixedomawa/8ibSnhi/pobikamolujemavaj.pdf
    • https://visosoduvevup.weebly.com/uploads/1/3/4/2/134234588/lidewamowez-degazi-zajomozeponi.pdf
    • https://buwotudotep.weebly.com/uploads/1/3/1/6/131606539/747d86.pdf
    • http://yognat.space/xirabademafvz1zo.pdf
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/8d06b365b60e8.pdf
    • http://particuliers-societegenerale.xyz/fonojitifizumovojavcc0b.pdf
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/xarejugel_birizomuguze_dilakosud_bexixijekusom.pdf
    • http://carbackseat.site/regular_and_irregular_verbs_list_with_meaning1th1u.pdf
    • https://fevegukiso.weebly.com/uploads/1/3/1/4/131482975/2f238395697f28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_6b246a34205b423c88802859eaf25a86.pdf?index=true
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_d1062d1a4dc54ec3a336c21f8ff0fb4b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe72.bin
e1466720296f6f1a6676bcc7fa73632be237b81506bb3d0c5e74b50b5e77e48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 4788 bytes
font_01_sfnt_off00010eb3.bin
72bf0358b87244cae8c386bb9bea7a8a8b2993417d2ed5743dd69337df1981a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 11256 bytes

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