Malicious PDF — malware analysis report

Static analysis result for SHA-256 22274f63ad19661c…

MALICIOUS

PDF

90.4 KB Created: 2021-04-03 15:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0b399cf7d8c9f7a65f76b240273564dd SHA-1: 6064aaa3ea87963fe8e5772cb7cb71899544181a SHA-256: 22274f63ad19661c5e45f890cf83a4f001c7d579a6623ff3c51670b5d782cc07
186 Risk Score

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 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/award?keyword=australian+passport+application+form+pdf+child PDF link annotation
    • http://vadigoz.iblogger.org/how_to_put_baby_in_ergo_forward_facing.pdfIn PDF document text
    • https://panofokolonap.weebly.com/uploads/1/3/4/4/134483377/vutotixoziwo.pdfIn PDF document text
    • https://migerele.weebly.com/uploads/1/3/1/4/131453560/720b7c2b0de66bb.pdfIn PDF document text
    • http://korixoludofuguk.scienceontheweb.net/poboxanolukiwaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0004ed2f-2fde-40fb-92ad-3c587d023488/zivaj.pdfIn PDF document text
    • http://degejukifukux.epizy.com/vudifasamonefuwasil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26170943-b2f9-4ae8-9f31-367aa196591c/why_is_percy_jackson_and_the_lightning_thief_rated_pg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747ea46c-543c-4df0-aaf7-1ba213cb2ec0/the_secret_dare_to_dream_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c593c1-69d2-4e45-8fd5-dc29f7bca9cf/win_server_2012_r2_end_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/bible_timeline_chart_with_world_history.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_72fc52c666da4bd39d21e7d843041519.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/luwupewixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de0bd48-7a1d-4e03-8abe-92631f7dc009/how_to_return_post_to_sender_uk.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/30764198370.pdfIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_544f1d963516420591480710c192b618.pdf?index=trueIn PDF document text
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_a69f6abcb07b48f19dfb1d41072e1ba7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/titan_440_paint_sprayer_sherwin_williams.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_4ec45ce4749040fd83736ac311859932.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_11e22fc00a7d4200b104c0dde01111a0.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11472 5148 bytes
SHA-256: 54a8e5259e8cf833c5f71fb43b1a48b175cf53d78f4bcbd51df461ff36f88d21
font_01_sfnt_off000125b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 11748 bytes
SHA-256: 60191f4613ad5687d9190b4ff252d95f65e2d93ceeddea3c7046f687945295b8
font_02_sfnt_off00014dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176