Malicious PDF — malware analysis report

Static analysis result for SHA-256 93718c40bdf8099f…

MALICIOUS

PDF

75.1 KB Created: 2021-03-05 04:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c7847b96f7f9f1f123a45ec89d78c8fc SHA-1: 19f000ea5159d128da2eb2760441672bdcd1c80e SHA-256: 93718c40bdf8099f2ff6c65a059d03371aeb549437f87c3935da49ba375b2247
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains a question that likely serves as a lure to click on these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://nipisod.ru/award?keyword=how+many+weights+does+a+grandfather+clock+have PDF link annotation
    • https://cdn.sqhk.co/gudijupimeb/ehdxjiz/weapon_master_classic_wow_orgrimmar.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/ijNS3jc/zikafokozozakoviledep.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/h88e8ib/33515639390.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/emEgeoC/negedavefavaxekivo.pdfIn PDF document text
    • https://linebabeta.weebly.com/uploads/1/3/5/3/135317009/sovenoropedixam-vujixinudugadim.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/pogava_bakedorepe_wovexopepu.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/iLghibv/ultimate_offroad_hill_driving_simulator_3d_apk_download.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/cf480ced6e9fe16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_3c161709e8274ebfbd767df30dbbede7.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_1fa2bd74bb01495b8255ba6168bf41a5.pdf?index=trueIn PDF document text
    • http://musarozopod.rf.gd/fozebozuzofekafa.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_5574b12fb42d4c08b0d7ce022d162b1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befafuni/97245737609.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/tim_ferriss_twitter.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_47dbe88118154c0494945f38105b1561.pdf?index=trueIn PDF document text
    • http://dodozos.epizy.com/expendables_4_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/3498764022.pdfIn PDF document text
    • http://kuxoxulid.epizy.com/90771242801.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/ap-_7532_access_point_installation_guide.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_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 5716 bytes
SHA-256: bea8085787b5e0fef100fefd69c84590807ef9146290d5fdbdc910b1636c457d
font_01_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 10380 bytes
SHA-256: 1738e4919c64cd482a4937e54e368434b9e32e107b66ff897e375bfc50e74d94

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