Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ed63386e70586…

MALICIOUS

PDF

83.4 KB Created: 2021-01-14 13:21:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 90d214beb1d3eefebb2b55f529779907 SHA-1: 810ae980041b2a1ad7f5b95aedb57073fb9f6b20 SHA-256: 700ed63386e7058649424a435725d5667a7ce13eee7e55cafdf070bd0a752fbc
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'academic performance meaning dictionary', directing users to external URLs.

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 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://trafffe.ru/aws?utm_term=academic+performance+meaning+dictionary PDF link annotation
    • https://site-1175164.mozfiles.com/files/1175164/rowudufeja.pdfIn PDF document text
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/zapusavujugisurigike.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/gchdhcO/spotlight_room_escape_level_4_door_code.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/8jaKvBX/toy_blast_hack_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/jeigFj6/baking_recipes_easy_no_egg.pdfIn PDF document text
    • https://site-1174133.mozfiles.com/files/1174133/806874981.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/gHght2B/two_dots_nano_appeared_on_my_iphone.pdfIn PDF document text
    • https://site-1178876.mozfiles.com/files/1178876/formula_e_racing_2020.pdfIn PDF document text
    • https://site-1177382.mozfiles.com/files/1177382/bejeweled_blitz_free_coins.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/fUigghe/jamman_looper_phrase_sampler.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fatikonavori/tilt_tv_antenna_review.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/bajar_ares_para_celular.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/98834546184.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/background_ppt_yang_bagus.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://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_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 5144 bytes
SHA-256: 3c2fea6fa1622756410d1da78a455467fcd928833838907cb919fe576a7f4476
font_01_sfnt_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 12440 bytes
SHA-256: 54cca3f9582e86454293f3a485a48053aa06739fe159165c2769911771b6aeca
font_02_sfnt_off00011d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D52 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa
font_03_sfnt_off000131e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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