Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b6ddeb333b2226…

MALICIOUS

PDF

76.0 KB Created: 2021-04-07 00:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7ff1dae4456339133423c51a90963cfd SHA-1: da32abedc2c41912537bc1bb3615102ea2bf8354 SHA-256: c8b6ddeb333b2226b37b20e3999f4357a5f0e9475ae1d680ecca57c70d24c22b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/strik?utm_term=kenneth+cole+watches+service+center+mumbai PDF link annotation
    • https://vasoderavir.weebly.com/uploads/1/3/4/7/134728489/5399134.pdfIn PDF document text
    • https://sezulozag.weebly.com/uploads/1/3/0/9/130969806/5132feb.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/4755696476.pdfIn PDF document text
    • https://kabulemumolitu.weebly.com/uploads/1/3/4/8/134869515/rizizidepuxun.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/97882854524.pdfIn PDF document text
    • https://wunopavowar.weebly.com/uploads/1/3/4/6/134660490/d18578afb84f52.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/gixufok.pdfIn PDF document text
    • https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/655c632acf9ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_8c9a4b703db7480b9dac41e9182e2c13.pdf?index=trueIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_b711a51a8a7f4fdc89f819c79d44579d.pdf?index=trueIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_75bb38cc87954f53a7f1555181502c08.pdf?index=trueIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_f351c7c2b67e491c9ddcaeb43645a9b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/902d7acb-2cf6-4689-bff5-709c6280c85c/what_if_cast_netflix_avery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1810b42a-f56c-4eaa-8fde-e8b74c433abc/mitasutomibanabed.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_af01149eeb604c2d82bfeb0219394eda.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdde6a5d-a136-4f13-9d99-467651289d30/how_to_solve_rubiks_cube_fastest.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_b5ea5749b1db49f396204acb7cb1a65f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdacb755-a4c3-4d87-8b6b-d7059004993c/44251479350.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_b68598aad6da4c7ab7b4e759bb289854.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/new_bollywood_full_movies_2017_mp4.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/xusulenimeruwetevimug.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/wanuzezuduk.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/47384212662.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_0b53603ff8c44c3490880f70b0bd7fc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/ariens_snow_blower_parts_lookup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDF 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 5300 bytes
SHA-256: e8a23970f3cb6050e735ceda19ecfc8c90e4001c8bf97a161584fbd19d4db67d
font_02_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 10632 bytes
SHA-256: a1c3bb7f34966026d18372e18b045cc2e8ed626ca7a3cd11951a406cecac518e