Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafb8f137c1d8945…

MALICIOUS

PDF

67.8 KB Created: 2021-04-14 01:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1716bef3bfdca2ed7d66c6364a54d5f2 SHA-1: 70beec7ddee0a7ef9037a717a8e5b8ad22f6022c SHA-256: eafb8f137c1d8945167b47cf3444428c03c800a5a785d14034b08ec6ad3f15cb
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant number pointing to external websites that appear to be part of a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://ponafet.ru/strik?utm_term=massey+ferguson+35+torque+specs PDF link annotation
    • http://melotedi.iblogger.org/wefigo.pdfIn PDF document text
    • http://x-bionic.shop/25634860597or6rg.pdfIn PDF document text
    • http://noksipals.online/hayward_bromine_feeder_cl220brr23i6.pdfIn PDF document text
    • http://academic-club.ru/best_caption_and_status_2020pgd52.pdfIn PDF document text
    • http://idealica-italiaofficial.site/definicion_de_arritmia_cardiaca975zp.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/23e084e5430d.pdfIn PDF document text
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/bemazironeg-ruzopejazefemuf.pdfIn PDF document text
    • http://nesobaka7.xyz/86712098194o7cty.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/jefazaxal/winopigalog.pdfIn PDF document text
    • http://pibixokemur.rf.gd/wogibawoxedoriranituzo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/columbus_ms_drivers_license_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/69869439290.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_4c5e762576554ba1b46aa11254b9699a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/6030185202.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_c93851e922134954ae8e91c368a0b400.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/lincoln_sync_3_android_auto_update.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/windows_movie_maker_2._6_codec_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/factory_data_reset_android_from_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/gefakidiwebidawexif.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_off0000cc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1A 5672 bytes
SHA-256: d706500a83352e82c5098da530ed03b2f356b1b6e09f0e0c93c7331ee3b2e559
font_01_sfnt_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 9940 bytes
SHA-256: d4a7c7d15d14a33b5e7728d77db67cb37dbc0fcb8e7d07b0db17f186d5e17bd9

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