Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2b30f6016b1ac9…

MALICIOUS

PDF

69.1 KB Created: 2020-11-22 20:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff51040c1aff1e3fc73427822059d6c SHA-1: 1ccbd06c29fd0c133de0eb937b07ac2dc1c810d1 SHA-256: db2b30f6016b1ac9357dbe7119e227cfab505ff3772d9f29029bea5ddda17ac1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to unknown or potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to external sites, likely for further exploitation or credential harvesting.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/aws?utm_term=robotic+arm+applications+pdf
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/56bb24b4d72.pdf
    • https://jazetixi.weebly.com/uploads/1/3/4/4/134494542/96fc3584ae2a.pdf
    • https://cdn-cms.f-static.net/uploads/4379471/normal_5f8b7323d8f45.pdf
    • https://cdn-cms.f-static.net/uploads/4423137/normal_5f9e4406d6348.pdf
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5faeb0a1b882e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2bd3c223-854b-4b3b-9d96-84cc72654e86/thermistance_dpart_chauffage_ouvert.pdf
    • https://s3.amazonaws.com/zetituri/qualitative_characteristics_of_useful_information.pdf
    • https://s3.amazonaws.com/libosokune/simone_de_beauvoir_libros.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/8953376264.pdf
    • https://s3.amazonaws.com/vavebufevodutob/whatsapp_status_love_images.pdf
    • https://s3.amazonaws.com/juliziwojatige/88419476090.pdf
    • https://s3.amazonaws.com/mijedusovineti/bankruptcy_act_1997.pdf
    • https://uploads.strikinglycdn.com/files/69b81312-740a-45a5-91c4-6f241593db40/bourbaki_theory_of_sets.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_off0000d31c.bin
16c4c646568d3038b6665079065d73c5ca72089a3a679525a7bb7e7993ccdeb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 5448 bytes
font_01_sfnt_off0000e58c.bin
00f36cb5bc613821292d9f2915eaf99c834dc8f3454bc8a08c248fc4e6747256
pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 10104 bytes