Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf2aa314ec439c1…

MALICIOUS

PDF

71.7 KB Created: 2021-05-30 19:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3bab1f2564307fe3eeb3d5a78ae662 SHA-1: ce182cd811d0a8cf7f906ecdbb0532f6ac553ab8 SHA-256: 6bf2aa314ec439c1b11ddce2b6ff626b7cee421b2602dff72e58fed9454ead15
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing or trojan threat. It contains a large number of external links, with a primary suspicious URL pointing to a site offering a download for 'minecraft pocket edition'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=descargar+minecraft+pocket+edition+0.15.0
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ff7d2e904d38.pdf
    • https://static.s123-cdn-static.com/uploads/4380857/normal_5fe0a91def886.pdf
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/lefap.pdf
    • https://cdn-cms.f-static.net/uploads/4489835/normal_602e478e2c4ad.pdf
    • https://gubilipolijig.weebly.com/uploads/1/3/4/7/134707964/467cc.pdf
    • https://static.s123-cdn-static-d.com/uploads/4457005/normal_60b32656159f9.pdf
    • https://cdn-cms.f-static.net/uploads/4487663/normal_605018987e116.pdf
    • https://luzafoku.weebly.com/uploads/1/3/0/8/130814295/5989816.pdf
    • https://tonulaluxi.weebly.com/uploads/1/3/4/0/134099082/difijesarujizo-kosezerefe-tulevoripelesas.pdf
    • https://xomivevisavuwog.weebly.com/uploads/1/3/4/8/134852088/4121166.pdf
    • https://bulasekujamur.weebly.com/uploads/1/3/4/3/134377464/dexopafenowu-mapawebupuvagu-jekigate-losuwi.pdf
    • https://bufopajej.weebly.com/uploads/1/3/5/9/135956722/tofego.pdf
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/75377fd95b0.pdf
    • https://cdn-cms.f-static.net/uploads/4366627/normal_602ff37fb270c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bc5cd2c7-60a8-4b77-87d8-6c475cf83911/how_to_walk_thich_nhat_hanh.pdf
    • https://uploads.strikinglycdn.com/files/94921842-4adb-4146-8aea-a1b19f03c69c/zafup.pdf
    • https://uploads.strikinglycdn.com/files/bfc97d26-ad5b-4e2b-9ce3-87e71edd7687/68807446177.pdf
    • https://uploads.strikinglycdn.com/files/dcd9242c-39d6-4198-95ac-b0b731ec5738/taco_bell_5_boxes_today.pdf
    • https://uploads.strikinglycdn.com/files/9a99e27b-55c5-4673-9c3f-07b9dad48484/bijesu.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_off0000d94c.bin
3feb53e9fb6dd7092b760565448e37ea8dd353234c5b2e868dbd6682b384dd77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 5856 bytes
font_01_sfnt_off0000ed42.bin
d6a84b6241c5df5f625c7d33d6703c645fbfd6e4df65324c8329fab07ac8e628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 10728 bytes

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