Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4c1179164f71c1…

MALICIOUS

PDF

92.1 KB Created: 2021-03-27 22:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c63089cf29dac23f6e2adbf8659a6be9 SHA-1: a93c7db8fb5f9552f579b3530e1656fcc91af722 SHA-256: ce4c1179164f71c12485d2eabdff7b489b56ea2c97fc8400cf69e256bb6d4ef0
156 Risk Score

Malware Insights

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

The PDF document contains a heuristic indicating it is part of a link farm, with numerous external links pointing to other PDFs. One of the primary URLs, 'https://soxebez.ru/wix?keyword=completing+perfect+square+trinomial+worksheet', suggests a lure related to educational content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via the linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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://soxebez.ru/wix?keyword=completing+perfect+square+trinomial+worksheet PDF link annotation
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/1262524.pdfIn PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/3566338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498834/normal_6047ce1e57fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_60315f89f23e7.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/2884762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391896/normal_5fdec6c6cf53c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fe268cc7895c.pdfIn PDF document text
    • https://sutopudebesi.weebly.com/uploads/1/3/1/4/131438093/7041457.pdfIn PDF document text
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/xakabavo-vilowubotukuju-kapubageki-zamelosebivefib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5fd87c205b65a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fcc9e941dce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5fe902b03b259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413976/normal_5fedfbbc41d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_60335c2377554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_601faf59936eb.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/calling_bell_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/viguluvikek.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/saitek_x52_pro_profiles_elite_dangerous.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_91b47e97770e4a52b51026f60722b34a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/putelekireza/kkhsou_deled_2nd_year_result_2018_marksheet.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_012d62dbd3624a0ab699e584927fbdf8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pogolo/bicycle_thieves_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/haunting_in_connecticut_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/20761651691.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_e25596efec3041fbbf235adde3faf708.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lepefi/samsung_hw-f450_subwoofer_pairing_without_remote.pdfIn PDF document text
    • https://07a970a6-a864-461d-ba0c-8deda34efc75.filesusr.com/ugd/b56c0d_0147d18d42af4b4182a6165140ead28e.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 7308 bytes
SHA-256: 589604985684bea9e35bfa6971ee09f0f7075eecc12fc381db6f00a6a83f9d54
font_01_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 2356 bytes
SHA-256: f3d1d636867381288dc000e1b60b7977821d326d4893967990e161cb937909f4
font_02_sfnt_off000112e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E2 5616 bytes
SHA-256: 0e2a943f679ee5aabf9c17b3aef8cf100de3970560604448f7b05649eaa57e40
font_03_sfnt_off000125ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EE 11164 bytes
SHA-256: 9cd0d90c8dbcbfe2c28ca4885a7c9a8180fe313750b1cd59d411444f1f81a976
font_04_sfnt_off00014c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C72 16060 bytes
SHA-256: 2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357

Open this report in the interactive analyzer, or submit your own file for analysis.