Malicious PDF — malware analysis report

Static analysis result for SHA-256 579ce9de1bdd9834…

MALICIOUS

PDF

86.2 KB Created: 2021-03-25 01:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 450a54c96749046bdf2d70a0428339a6 SHA-1: 4125ed5f5c1b06bbbf4e1f2c0d9d350a96c13957 SHA-256: 579ce9de1bdd98345dd4ed2f6f9bc69b9af7e9d194b86478f27a8f7f71ee34e1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary focus on a link to 'golowaki.ru' which appears to be a keyword-driven redirector. The document body, though heavily obfuscated, suggests a lure related to 'Dragon ball super game apk', aiming to trick users into visiting the malicious site. The presence of multiple disposable hosting links further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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://golowaki.ru/wix?keyword=dragon+ball+super+game+apk PDF link annotation
    • https://cdn.sqhk.co/dijadive/fSbxB8y/nedajogopoxisuruzikimoro.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/fr4HhfY/jujololibumomas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_60403c3c16e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_60465c624c630.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/jgge3oO/weekly_lesson_plan_template_middle_school.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/egdKjbN/76402858789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483608/normal_5ffb8d241b60d.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/bhjidFZ/dimeribawipoperiwo.pdfIn PDF document text
    • http://tifebozazam.iblogger.org/98009825591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_600d5109663ee.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/f0vgigj/ringtone_maker_for_iphone_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/dheLZ1P/lifeafter_update_september.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_60144eb5402a5.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/cf257877-4bac-4b96-8656-14343b210f2c/is_popcorn_ok_to_eat_on_candida_diet.pdfIn PDF document text
    • http://zilomit.epizy.com/nesog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29634032-72dd-441c-ba96-5fd2aae5c865/85418661416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650aae39-5082-4044-93f8-e5a10cf0ae5f/17065503208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c1cb8d-adc1-46f4-8d99-86ceb1515c04/how_to_utilize_international_bill_of_exchange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f525c43b-1d1c-4361-89eb-1d456a9f3887/how_do_you_draw_a_turkey_leg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f16cc60-35ae-442f-8a59-43f777e0c5f7/xirebexetipojonoliluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc684c9-85a8-4898-9146-461993100295/finding_interior_angles_of_a_triangle_worksheet.pdfIn PDF document text
    • http://fasokefukolu.epizy.com/vorubilal.pdfIn PDF document text
    • http://nujorowej.epizy.com/astronomy_today_mcmillan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f20d39-5aca-4418-80e7-93b2bfbcb7d3/screenwriters_bible_7th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff96a8c3-e67b-4f43-a1a2-22c3eaaf2574/8263798396.pdfIn PDF document text
    • http://wibexojul.rf.gd/55951694856.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_off000111e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 5340 bytes
SHA-256: 641c82be4c0ec860c86c5aac82425e4b62907346d77bb7cc113ae1a742530131
font_01_sfnt_off00012402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 11640 bytes
SHA-256: 5fbb2278cd7976a26fedec87059ce16b37aa58746ced9d10f936fec9f56dbd2b