Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0fe14a211caf2…

MALICIOUS

PDF

71.5 KB Created: 2020-12-18 08:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b13589a135957fcb7a5562263060298 SHA-1: 15131ae5dd8eadfcc81b7ae2acebf45cb25e8931 SHA-256: 5cd0fe14a211caf2681b1b0da56652ef59f99ec79503a36d1144f9d8f28954f7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://traffset.ru/strik?utm_term=carlos+scola+pliego+biografia', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution, aligning with the Spearphishing Attachment technique.

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://traffset.ru/strik?utm_term=carlos+scola+pliego+biografia
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fb6ae66163de.pdf
    • https://bejulukif.weebly.com/uploads/1/3/4/7/134746679/7312137.pdf
    • https://cdn-cms.f-static.net/uploads/4449618/normal_5fa3cef65c6c6.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/dujulovukopofelig.pdf
    • https://cdn-cms.f-static.net/uploads/4465398/normal_5fa23f951003f.pdf
    • https://turetajonu.weebly.com/uploads/1/3/4/6/134629909/fibuduborilisi.pdf
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f9aa0f5c760a.pdf
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fc3f50b1047b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f62628b8-b3b1-4a8a-ae38-713f8d176adb/zanti_apk_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/bd35760b-dc0a-466d-b20e-dc9859eba5e6/hot_beverage_dispenser_machine.pdf
    • https://uploads.strikinglycdn.com/files/95128d9c-8cd7-43a8-ad33-9be04356f030/waguwip.pdf
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fcfd2ed2564c77af026bdb5/1607455470623/fobum.pdf
    • https://uploads.strikinglycdn.com/files/c33b33c2-1320-4ea9-a5fb-26730ce5b7db/55008835460.pdf
    • https://uploads.strikinglycdn.com/files/a6c7fa9a-43a7-4ba9-9a3f-c588348c7eef/delia_girlfriends_guide.pdf
    • https://static1.squarespace.com/static/5fc29ae5bdb33045eecd1eec/t/5fcf99f4556296156158d601/1607440885941/land_conquered_by_david.pdf
    • https://static1.squarespace.com/static/5fc0ed012e537a05ef0936a0/t/5fc4038761e25426e1b4ae57/1606681479588/48646455690.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce23.bin
1fea211cdd17cf8fdbd7810b4cb894379e35821bf68fffaa7bf6d0f34ca9c858		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE23 4948 bytes
font_01_sfnt_off0000df02.bin
4df9d418dbf52bcfe132017d312338242c25dcd1a1ce9fd78b42c8b8aca8972e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 10456 bytes
font_02_sfnt_off000102ee.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.