Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bac32f38e4c5dc6…

MALICIOUS

PDF

93.5 KB Created: 2021-03-18 16:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3109588a2b03df4be7dd0c4aa076fb86 SHA-1: 530e24a4e0a6a3bced67350f404716fe0dec3006 SHA-256: 1bac32f38e4c5dc671381c31ba9680e48bc4e8fbde27e3b1dd094674b3d54be5
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 phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to product searches, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=which+char+broil+grill+is+the+best PDF link annotation
    • http://rinujajija.getenjoyment.net/51547023541.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/tikikusotixamifavagas.pdfIn PDF document text
    • https://gixobuwek.weebly.com/uploads/1/3/2/8/132815317/dematinonuvura-jafelawiko-sijixijigu.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/5cd49757e9.pdfIn PDF document text
    • http://bestrongbyg.com/23732080775cf04c.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/soxonilajen.pdfIn PDF document text
    • http://grandov.pro/red_cross_first_aid_training_fees2ngj4.pdfIn PDF document text
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/merodew-wotix-sividufo.pdfIn PDF document text
    • http://imedo.ru/beretta_92_brigadier_weightdjxqy.pdfIn PDF document text
    • https://rulozakowix.weebly.com/uploads/1/3/4/7/134730123/186524d.pdfIn PDF document text
    • http://blacklaser.ru/29648606983qnja5.pdfIn PDF document text
    • https://femidizori.weebly.com/uploads/1/3/4/6/134684525/rutogunevaluberutul.pdfIn PDF document text
    • https://winojarenegesut.weebly.com/uploads/1/3/4/4/134481716/gekexej.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/0427328b-acc7-4d7f-8e16-fb4e7df98fbd/kikunagiruzijejewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab1bf51-bd48-4595-9477-4e7e473b1020/harga_mixer_mackie_32_channel.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/29745665980.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/pebumirevisileluvurasodiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003fc3a6-6faf-4c0c-b2ee-e10301765394/integrated_chinese_level_1_part_1_lesson_4_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/silejezufewaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652bed96-2b78-4103-878d-e9f314ef4437/40361989978.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/gesili.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/tusuzudadogelolurine.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_off000132ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AE 5216 bytes
SHA-256: d987f7c948f13c63462ca23fd8d01799ed1c65fdce952f489f474772d8cd3791
font_01_sfnt_off00014476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14476 10808 bytes
SHA-256: a3fc923fb5a93d5beeb67414ab1aed765bb8573be881aa2c5fe7fe6a55766a0c

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