Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e05d0c2549cd7d7…

MALICIOUS

PDF

78.9 KB Created: 2021-03-17 18:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8f38cd94f15aedf97d24317f1e7ee5e0 SHA-1: 8e8aaa94a792feec898656a17fe57c82b76af170 SHA-256: 9e05d0c2549cd7d7290d8bf45976628be556bc7e3e1b6ea884c9d66531f7e022
196 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a link farm with numerous external PDF links, many of which are SEO-optimized and lead to redirectors. The primary redirector URL is https://jottigo.ru/123?utm_term=avanza+g+2017+manual, which appears to be part of a phishing or scam operation disguised as a manual or quiz download. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/123?utm_term=avanza+g+2017+manual PDF link annotation
    • https://rorujazikuje.weebly.com/uploads/1/3/1/3/131379225/xezolixuva.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/3425335.pdfIn PDF document text
    • https://nesiwebe.weebly.com/uploads/1/3/5/3/135399888/metefikaxo.pdfIn PDF document text
    • https://giliwafe.weebly.com/uploads/1/3/4/0/134016831/b57ce6f9d7585.pdfIn PDF document text
    • http://fastgetme.online/metavadenieakky.pdfIn PDF document text
    • http://verifiedbadges-form.com/eckert_animal_physiology19kej.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/wafeniserefupoduvaf.pdfIn PDF document text
    • http://biolinkus.me/95826777799wl5sx.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/1162902.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/rutufokedizon/ai_football_ggo_series.pdfIn PDF document text
    • http://morufigalolo.rf.gd/biology_quiz_multiple_choice_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/kapurilez.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/the_adventures_of_tom_sawyer_chapter_2_questions_and_answers.pdfIn PDF document text
    • http://diginerovitigu.rf.gd/truck_body_parts_names_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/eclipse_ide_for_enterprise_java_developers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/3942824413.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/social_research_definition_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/dramatic_irony_in_romeo_and_juliet_act_4_scene_4.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/gawivexumusesap.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 5236 bytes
SHA-256: 2648fc1a00902d04ebcedbace03780a18faea6d6583cc93fdc608c0fc029bd0b
font_02_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 10716 bytes
SHA-256: 2e0a86aca00cfd5aca0087d76080e8fc9fadc97b49ab7e6d068642ee7ccd2c29

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