Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd78cfefe19e1bb9…

MALICIOUS

PDF

86.1 KB Created: 2021-03-26 08:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 80386650220df56be69c40a54ebd4d26 SHA-1: 8a6c46a56377e48560ba2d51050474de14a7b8c2 SHA-256: dd78cfefe19e1bb9fcd912c090d99e1dd01f96734aaa13bade11b3f8f2004dc0
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' confirm its malicious nature. The embedded URLs, such as 'https://xajibur.ru/wix?keyword=afk+frozen+pass+guide' and 'http://ru-order-687646765445.art/mr_coffee_ecmp50_two_blinking_lightsozqwf.pdf', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://xajibur.ru/wix?keyword=afk+frozen+pass+guide PDF link annotation
    • http://ru-order-687646765445.art/mr_coffee_ecmp50_two_blinking_lightsozqwf.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/ficghfY/75192513330.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/mefepakajenadiwevewulai92qz.pdfIn PDF document text
    • http://cheapkeys.site/pharmacognosy_ck_kokate_freefkt6w.pdfIn PDF document text
    • http://nugudisidagok.22web.org/how_to_pair_samsung_tv_remote_2015.pdfIn PDF document text
    • http://bluebadgeapproval.com/mercury_3.5hp_outboard_carburetor_rebuild_kitr3265.pdfIn PDF document text
    • http://axacheat4.xyz/30410572994aioun.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/iiggigg/bet_shows_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc63a19-8c8b-4335-9557-d956b7734d6f/17362891457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191ddec6-f28b-4e16-915e-137350733dcf/93543143856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35fc2289-56cb-4a62-bb5d-4da190da3448/the_stranger_book_harlan_coben_series.pdfIn PDF document text
    • http://boribasumagit.epizy.com/45819804301.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_f4dfc53486d64047a5d91fe2dfbc116f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b70e148-a6cf-4add-8225-9b8d6ad1a984/black_and_decker_weed_eater_18v_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc675f51-046c-45d3-af5c-94679102c0b5/xomupilufuloxazojuvakof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbd5172-54de-4106-83e5-a2059f2b43d5/best_free_logo_maker_app_for_mac.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/9902295530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6c5740-9ecd-429c-8a6e-80da79a84c5c/sig_sauer_p226_22lr_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafabfbb-2c25-4263-9152-90b2fe6b6a7c/the_crown_season_3_episode_10_cast_roddy.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/charitable_trust_audit_report_format_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913f0bf0-2111-4f14-867c-4e30b22be4c4/9602910540.pdfIn PDF document text
    • http://dofavopuberobot.epizy.com/23603272067.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_7ec2221e0f654070aba7bd6d40a607c5.pdf?index=trueIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_a559952da37f4f4c9313bedff415bf8c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1163980f-1ac9-4d7a-bfd0-eb99e8695ea9/sebastian_junger_tribe.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_48dce16b6e604b6097e6ce58ec7fba12.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 5280 bytes
SHA-256: 4714d7db2239619ffeb6ca59b30b4a2f67668e497433214e0b59bfd9d2751969
font_01_sfnt_off0001068e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00010f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1C 10688 bytes
SHA-256: 421ab9809650e552138c46b4a601718e8ca3ace5c2f97443045be7b1e5ac7849
font_03_sfnt_off000133fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FC 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36