Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd4664a926b2a75…

MALICIOUS

PDF

130.7 KB Created: 2021-03-22 17:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 27abe32179009ff85ccc6a21556e6bd7 SHA-1: 23d7147ed52c3e0d4d6c7a0ce8bf0a813b5f2895 SHA-256: 3cd4664a926b2a75598f608ce8a218bf40f4e43400df564606f6149b6980664e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with the primary heuristic indicating a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing or trojan delivery. While no scripts were explicitly extracted, the presence of numerous external URLs, including one with a suspicious domain, points towards a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/123?utm_term=vande+mataram+malayalam+lyrics PDF link annotation
    • http://faxixovojaja.sportsontheweb.net/osprey_publishing_artwork.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/52538874808.pdfIn PDF document text
    • http://liketsven.xyz/voice_synthesizer_application_androidpz3gu.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/how_to_use_the_single_cup_keurigofaq2.pdfIn PDF document text
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/jojedojomofo.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/f5b2b5e3b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375896/normal_60075d6732c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5fc6045d9b563.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/mufukep/video_editor_software_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/load_cell_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/25939658080.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/anatomy_and_physiology_chapter_12_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/polaris_3900_parts_39-401.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001cfc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CFC6 13696 bytes
SHA-256: 1ac0b535dd48dc6ca7c3c0b809697043bda8b93448b1b64c972a6081ca7adb40
font_00_sfnt_off00014022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14022 5152 bytes
SHA-256: cb78bf6314854e175358e3772b1fef0e34d77772aaf6ad7f506c012978320c96
font_01_sfnt_off00015199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15199 14376 bytes
SHA-256: 180f60691ef1a87b4be44066fd6ba060da08c59efef6874d4f8176c99ce03c05
font_02_sfnt_off00017d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D72 12636 bytes
SHA-256: 55cd3e31bf6daed62b4dbad3e24c596ef28c3357a42bfe7ac35059bad853df11
font_03_sfnt_off0001a6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6D9 13604 bytes
SHA-256: 99da82f311fe2ecb02835805a8ef61a176db4deaf60046857353ecc9f2b3cbda

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