Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c580e0d80290c18…

MALICIOUS

PDF

76.6 KB Created: 2021-02-12 17:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5004bedf28e3297e287807d5cccb9206 SHA-1: d1826a095a15b928ad38ba4c36f52073f08959ae SHA-256: 3c580e0d80290c183f9a4fe53b99ff6efe066b5443812e2b406140526d06403b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external links leads to a URL that appears to be a lure for 'adivasi video song 2017'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common method for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://leonvi.ru/wb?keyword=adivasi%20video%20song%20%202017 PDF link annotation
    • https://wavurujubatebar.weebly.com/uploads/1/3/2/6/132682053/zuxirite.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/ifjbFB5/used_metal_shredding_machines_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/TjgigdG/drug_lord_2_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/yowhatsapp_new_version_v8.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/26492587888.pdfIn PDF document text
    • http://mogewatiside.epizy.com/31082362093.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/brothers_telugu_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/loposexedegebe.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/sanoluvo.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/lajuzowewerarivamu.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/guide_to_real_estate_investing.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/agrarian_reform_community_meaning.pdfIn PDF document text
    • http://patenat.epizy.com/proform_cardio_hiit_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/zezosorenux.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_off0000dfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBC 5028 bytes
SHA-256: a29d0e72b7a212c31575896f1b78a0c3abb4ecc962570bf3740a6b4455410af8
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 11408 bytes
SHA-256: c0f79a4af3c6a4ad78f7a49b6dbfa1db33e2781ccb056268963c40516947443e
font_02_sfnt_off00011777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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