Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7467090548e0421…

MALICIOUS

PDF

102.5 KB Created: 2021-01-06 08:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0dc35cb7aba111a1a45103cb80a9099e SHA-1: 0925c5a82d6fb64a4ff592b253a42056cd23e3a2 SHA-256: a7467090548e0421819a413f53243e8b4954bcfe0ed6db7b9997516a20daf882
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffnew.ru/aws?utm_term=platform+account+executive+salesforce+salary PDF link annotation
    • https://cdn.sqhk.co/galemojubemo/gpxhihb/shipping_match-_3_adventure_time.pdfIn PDF document text
    • https://cdn.sqhk.co/kesokirow/HjhWQ7L/range_master_sniper_academy_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/boremagu/cigZWhh/best_of_country_music_2020_youtube.pdfIn PDF document text
    • https://bimovuwun.weebly.com/uploads/1/3/4/7/134727863/takegared.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ff2d603ccd00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450040/normal_5ff0ce375320a.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/tewanotajumuruparaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e65d789-ff1b-425d-ad97-60071c88b343/sojatazibodevuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e34a032-a630-44a7-a8c2-a932132b5330/camp_half_blood_confidential_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8747a5f-754c-4ab0-a829-15e399cfc30a/zapidudinudirazenive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c85f7d-45a2-4466-800f-c64589f90a9f/fire_emblem_sacred_stones_cheats_gameshark_v3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b00cac1-2e30-43c7-90c4-bfd9bba44f03/basic_french_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc4f6e1-bcec-401a-81c1-5510d8fddc94/lubutupigasobanefajosag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d06deeb-26e0-4dd7-b900-df19d02e32a3/mobogepudejetedibutavibek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb2e0f5-5db4-4a09-87b7-42d69179b940/7_jours_sur_la_planete_videos.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15414 5260 bytes
SHA-256: 94b272be0599caeab562db397821e4b73fc975a9024395d622c50b41bbfb987a
font_01_sfnt_off000165f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165F3 11464 bytes
SHA-256: b7f5b7398ccad64fdf41748705bbaffb820c1008574fc73706d7dd53de9f4810

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