Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f7516a7077cf18…

MALICIOUS

PDF

75.2 KB Created: 2021-05-11 09:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bc39a7b22475f360788a98c3242d9610 SHA-1: 7f379ff830ad6ea5f8b911cd72844bef2e6241d1 SHA-256: 02f7516a7077cf180eed13b35bc069b52cb697c7261155dc81ad7dc433c6f6b8
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO redirectors designed to phish users. The primary lure appears to be a search result for a popular movie, aiming to trick users into clicking malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=is+the+woman+in+the+window+on+netflix+now PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5ff7d7ac04741.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fefa408e086a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_605f4500e5a4e.pdfIn PDF document text
    • https://wozavosasegug.weebly.com/uploads/1/3/4/5/134509229/9180316.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/davaxip-pofat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443624/normal_5fffe0180f0d0.pdfIn PDF document text
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/9658526.pdfIn PDF document text
    • http://pubguckazan.com/bhagavad_gita_slokas_with_meaning_in_telugujuii3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_6042bde1cb0d4.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/vetixezizubulus.pdfIn PDF document text
    • http://my-favshopf.online/i_am_joaquin_by_rodolfo_corky_gonzales_summaryj0dol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496170/normal_6009cc3bedf6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_6042992b8f7b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_3a3d36cbfd5d4b22b261ccb003aca528.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/what_are_the_two_main_types_of_research_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/12755638023.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_4748d601580443acb417114e1d8f4d1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/fronius_10kw_symo_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/index_notation_worksheet_tes.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_a006377f82a045fb93f7601ef36e1e84.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 5148 bytes
SHA-256: bdf2984fb1fd3f01a0eedcc4b8e2c38d60c3dab0613c92c982f48c4e40490c9e
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 11336 bytes
SHA-256: 39d8bad345d5ce661cdf455f8594694c7e8575e46da34d647139d2d082afe2d1