Malicious PDF — malware analysis report

Static analysis result for SHA-256 1784edcfb7302118…

MALICIOUS

PDF

100.1 KB Created: 2021-04-02 17:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1ea865c0ff0d518af97b60a6d7559d4b SHA-1: 15959ad1c8fa7afd7410067d7610dbf3700654c5 SHA-256: 1784edcfb7302118af8eb6699d3dbbf98d0d27db5f9cdd01b2feecc97ca68554
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with the primary suspicious URL being 'https://bologen.ru/wix?keyword=philippine+coast+guard+auxiliary+manual'. This suggests the document is part of a phishing or SEO spam campaign designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=philippine+coast+guard+auxiliary+manual PDF link annotation
    • https://cdn.sqhk.co/pisomuma/gtZOghY/coin_counter_machine_publix.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/X85jaWK/25932182955.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/Kifgdjf/bike_tracks_near_mernda.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/SidWzMF/rikimabupesanizax.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/hjfhcE1/kubuxibidokizubiguralago.pdfIn PDF document text
    • https://cdn.sqhk.co/lutotilivik/idjgRhj/can_itunes_run_on_android_tablet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_3da80c4c56984076886b54b98f193b51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vapite/19588596391.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_dd62322679c6412cba5a535ed2e9138d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/page_keeley_probes.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/17111642439.pdfIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_fb3099c22a674ae2ac975c7c9f602ed3.pdf?index=trueIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_ed7c5fcdebff4acea0443dc4519f86f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/70093088611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84eb053a-d857-46c9-a2b2-9edface047a5/what_is_mean_by_privileged_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015329bf-a611-436b-ae13-04b9f6934203/how_to_study_for_usmle_step_1_while_working.pdfIn PDF document text
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_59944c42cdcc4b898271231ae61de5b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b13c31-0f49-43c4-bf46-5aae50c6c937/neuropsychological_memory_test_online.pdfIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_512eb0d9c49c4c81b7100c5c8e34154c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f542cc-1af5-49a8-bf01-c065d1fd6290/senuvutekanos.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_811d897248c44c4f9b3c722164e19d93.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_9451b66b216c41dfa36659324c2533f2.pdf?index=trueIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_cdcdd12657b74992bd8c3c3575d2807a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuponefi/6192806790.pdfIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_3b3fe9a18e4843418bb4ed4e3ee22125.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E2 5660 bytes
SHA-256: 9130ab383c2bc81fb91d433c9f0f368f7fa0f2b7897bb098997289fbd88f71eb
font_01_sfnt_off00015b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B07 11612 bytes
SHA-256: 9e1f351449887b218a87d5cdc6f22e99e28ab7f25e510e328fd6dd099548ecae