Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c280aba599554c5…

MALICIOUS

PDF

94.8 KB Created: 2021-03-21 05:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 66effc46503de9b68c01f7df48002b64 SHA-1: 02d6937b1c20255982c1b6742cbcd85365d7778a SHA-256: 3c280aba599554c5dd8294394ae8abfb36798e99459a942ee83e484c0e97838a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to product reviews, suggesting a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=titan+gel+reviews+philippines PDF link annotation
    • https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/bozorafufit-mixet.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/88347a363f0.pdfIn PDF document text
    • http://gimepar.22web.org/rupepu.pdfIn PDF document text
    • https://visufevulun.weebly.com/uploads/1/3/4/3/134310134/bizog-pimumov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_9cc38c6766974ebfa4b83a0c9e5fad4e.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_15d5dd02ab8249c7a08cf3d586f29078.pdf?index=trueIn PDF document text
    • http://mefowoweman.epizy.com/jelew.pdfIn PDF document text
    • http://dekijewawusex.epizy.com/23912798240.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/us_fda_21_cfr_part_11_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/amma_amma_asai_amma_song_audio.pdfIn PDF document text
    • http://potefedezazox.rf.gd/aftab_shivdasani_song.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_460928a650d24fe19234de1cc0dc32ee.pdf?index=trueIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_c80b14a017214ee9a120c04593ce861e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/ayo_and_teo_rolex_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/animasi_untuk_power_point_2013.pdfIn PDF document text
    • http://pogosib.epizy.com/gogabedatumudafi.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_0b9c104d3d7c475aa06ff98fbb25addf.pdf?index=trueIn PDF document text
    • http://saponasikaxugab.epizy.com/12337649884.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/28734357919.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/wutubozivibadesijaxajen.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/61757454645.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_off0001330c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330C 5180 bytes
SHA-256: 1200d96b6b4383858bddeb84756a79bb97301639a038785ee199cff9159c50aa
font_01_sfnt_off000144c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C0 12012 bytes
SHA-256: 24d282e3894d4ead5167df33778faee7f7b6b4579bad5a3bb77a760589c26539

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