Malicious PDF — malware analysis report

Static analysis result for SHA-256 f772c7a7c14d8f88…

MALICIOUS

PDF

83.3 KB Created: 2021-03-29 08:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7ad3b8554421c643b1adfc05533a6321 SHA-1: bb0e24f558bcd1587c1db6b531a2f9c594c6c62f SHA-256: f772c7a7c14d8f88d4151bf33aa418184626124cebc5e8550b8e0803767ea503
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a high-confidence heuristic firing for a link redirecting to a phishing site, disguised as a free download. The ML classifier and ClamAV also flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware distribution page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://ponafet.ru/award?keyword=citizen+calibre+8700+user+manual+pdf PDF link annotation
    • http://sdek-24.cc/751644433053tzkp.pdfIn PDF document text
    • http://nickned.me/hypnosis_guided_meditation_for_deep_sleeplr5bw.pdfIn PDF document text
    • http://republvinb.fun/danemobilagelugujuponltp38.pdfIn PDF document text
    • http://bupetud.xyz/23847766777rhxys.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/welanisowari/birerarokiwilimovevi.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/field_visit_report_writing_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/ambience_sound_effects_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afad8831-df60-4b7b-8024-4d91dc5b9428/free_download_m-audio_fast_track_c400_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb510d7a-93ca-4c96-889d-e94f07f846e4/japan_sword_fighting_style.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/berklee_performance_center_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/the_masked_singer_2019_episode_3_season_4.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/vuvezojibawula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380c9d2c-0b8c-47bb-be83-553dd967c673/mamaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0622b6e-c567-49b4-8c7d-8c994ff2462c/talk_to_me_in_korean_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/teamviewer_12_free_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/what_are_dok_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/sarid.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/solving_equations_test.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/91891715656.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/harringtons_dog_food_15kg_feeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/national_highway_traffic_safety_administration_permit.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/nowuzilijunaloviberoviwa.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/dixejifogev.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/ballena_orca_informacion.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/belubovewagewovazinodox.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_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 5812 bytes
SHA-256: 90912c215ab8e7d4dd04a1d94c3d202a144c97dac45399a4a0fd6513f16b3e51
font_01_sfnt_off0001199c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 11196 bytes
SHA-256: bb5dbd5d7a2c236ca47d1a59c3803f3a3e81d3ce8732bb57650a0fcda5f61272

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