Malicious PDF — malware analysis report

Static analysis result for SHA-256 c922bf552b57b853…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 12:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 02fc1d97722aa775328896852f39e898 SHA-1: 9ca1dd1e5ddbb2e4a8bf9e438fe923baa9c45739 SHA-256: c922bf552b57b8536d0181b4f14f7f4aae5f9ea820ee1c8f02a5fd6480d75842
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to potentially malicious domains, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of embedded URIs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=sending+stones+5e+eberron PDF link annotation
    • http://titoto.xyz/adriana_calcanhotto_albumr5f0p.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/ifhc47y/boku_no_hero_academia_quiz_buzzfeed.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/Djcjbic/kodekeroxetulime.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/ggjihwQ/52696971296.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/sgd6hfH/bapaminumur.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/fxXyhgt/aquarium_fish_online_shop_singapore.pdfIn PDF document text
    • http://mmamba.ru/taco_bell_chicken_quesadilla_nutrition_infoo1v2c.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/gc3Ciir/icc_cricket_match_live_score_2019.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://s3.amazonaws.com/bubisifapagefe/agario_2._7._0_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/everstart_maxx_jump_starter_600_amp_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/regarding_henry_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/alphanumeric_series_for_sbi_po.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ffbd3b-b1d0-4086-8d22-f8f94c76584b/juwaxodov.pdfIn PDF document text
    • https://e0f342e7-0099-43b3-82d9-a29d4e9f1e2e.filesusr.com/ugd/3bcfef_4ed8585d64264bc3a051a33680857a60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/flute_etudes_for_college_auditions.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_f415c01f93a54cb7a6f5eccbe0ea1aa5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6aa7540-5c74-4957-985c-df30b6f64bf5/words_that_start_with_n_and_end_with_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58adf57d-73de-40fc-8a62-d5992e7a5f29/58120352350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf8603b-6a94-43ef-8ae8-d43aca7ed0eb/volar_sobre_el_pantano_libro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 4908 bytes
SHA-256: eba684cca0409643c3d76f2e6a32fd5533b0b80e4930b2a0e5855b35701c6b74
font_01_sfnt_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 10276 bytes
SHA-256: e5fed77dc7dfc248747e7fc5ce97c09ff81e0b94bf5edfd006b75a5ef161c616
font_02_sfnt_off00011b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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