Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e1a097cca1882c…

MALICIOUS

PDF

75.1 KB Created: 2021-06-01 03:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2255887e0beb2076593475a9a3168ad SHA-1: dc47d79e82a23ac14fbf454245a547b0cf9b19bb SHA-256: 56e1a097cca1882c13d16a7d4eab8e0c7d1f13ba6cdd05012cb6d67835217d00
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, masquerading as search results for downloading an Aadhar card. This is indicative of a link farm or phishing attempt designed to redirect users to malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/pbw?utm_term=how+can+i+download+my+aadhar+card+by+mobile+number
    • https://static.s123-cdn-static.com/uploads/4470535/normal_5ffd7e03cb71c.pdf
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5ffb2db4812f3.pdf
    • https://static.s123-cdn-static.com/uploads/4375351/normal_5fcf3349634cb.pdf
    • https://cdn-cms.f-static.net/uploads/4378604/normal_604b8cbd7f16e.pdf
    • https://cdn-cms.f-static.net/uploads/4383678/normal_601b1329d22d9.pdf
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/8e0b46f6ba059.pdf
    • https://cdn-cms.f-static.net/uploads/4390684/normal_605f2e14d8f10.pdf
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/girasumiroviz.pdf
    • https://moxatabik.weebly.com/uploads/1/3/4/8/134885740/af40dae347b.pdf
    • https://xelekukoxenafo.weebly.com/uploads/1/3/7/5/137513843/bokofetuzibebo.pdf
    • https://ladifibefumuxuw.weebly.com/uploads/1/3/4/3/134353250/xeweposogazane_kekavisewesoza.pdf
    • https://cdn-cms.f-static.net/uploads/4420747/normal_6069d8665d70d.pdf
    • https://cdn-cms.f-static.net/uploads/4418362/normal_5fd3b9571ef2b.pdf
    • https://static.s123-cdn-static.com/uploads/4487902/normal_5fe4fdad8142a.pdf
    • https://cdn-cms.f-static.net/uploads/4478927/normal_602589433b292.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c00d43a-193b-4a88-86a9-52baea27350d/can_you_factory_reset_a_disabled_iphone_without_a_computer.pdf
    • https://uploads.strikinglycdn.com/files/a5ed4a5b-7366-4c79-8ce3-9b11aaa782f4/tigivev.pdf
    • https://uploads.strikinglycdn.com/files/86e4ab04-eebe-4a46-9cf2-fcf083a2f4ac/nuzotija.pdf
    • https://uploads.strikinglycdn.com/files/dc9226ad-85c2-4a00-a4c6-ba6b2a27465c/does_keller_williams_offer_training.pdf
    • https://uploads.strikinglycdn.com/files/5707d871-16e9-4095-a8f2-c112ff92c630/inventory_management_process_flow_chart.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f1.bin
3d178656885ab3391c9968a22f7af11c4cbc3b14836bd26de4b142d4eec021b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 5296 bytes
font_01_sfnt_off0000f9da.bin
b7898a4b3a35a4973dfd848c20d58af63e6e88ea89de5edf32740800fedbaf89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 10820 bytes

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