Malicious PDF — malware analysis report

Static analysis result for SHA-256 b344bc602679b0ae…

MALICIOUS

PDF

63.4 KB Created: 2020-11-27 11:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47f6ce3c1df08d3e3e485e76d49cadf4 SHA-1: 1b099da71fcdd95c74fa946d0061a53957d4959d SHA-256: b344bc602679b0aee750b305c75808a0225a9344bbdf7726399986dac9169e0c
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though partially corrupted, suggests a lure related to an 'ordering guide', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/aws?utm_term=ie-+3000-+8tc+ordering+guide
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/08b7458beee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0df93dc4-2898-45e3-806d-971985e6d132/44037777102.pdf
    • https://uploads.strikinglycdn.com/files/90651aee-b922-4db7-aaa8-aeb815f792a9/download_castle_clash_mod_apk_new_version.pdf
    • https://uploads.strikinglycdn.com/files/47347ac5-a03a-4b21-9719-7f50a222e14d/90713265670.pdf
    • https://uploads.strikinglycdn.com/files/7d4925fa-24a8-4a0f-b33f-e0211dbd2f3d/eighth_grade_streaming_vostfr.pdf
    • https://s3.amazonaws.com/falevi/rorenovugilugakuxe.pdf
    • https://uploads.strikinglycdn.com/files/53dc44e0-4d60-4d3d-88c7-46486fe6558c/vadazadoditovimitojepa.pdf
    • https://uploads.strikinglycdn.com/files/0f40a43e-e102-4ea2-9cd5-82c443c8786c/vafowetuga.pdf
    • https://uploads.strikinglycdn.com/files/7b15d771-e33d-44f5-afa8-a32412730afb/devogifokabuvaketivuto.pdf
    • https://uploads.strikinglycdn.com/files/82e2a580-d854-4172-8cc2-1ecb09ad9c4a/47509602732.pdf
    • https://uploads.strikinglycdn.com/files/eb84d8ed-09d5-4a0d-a2d5-ca77643c1e1a/23940300514.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_off0000b9e5.bin
254f42e4ebd22df89e33081aba679e27c453b856a4b90b95753f915c8d7e4ff1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E5 5156 bytes
font_01_sfnt_off0000cb8e.bin
6fda74c0ec05f84aa938777dcf931d7591c1e79eda86f90d073fc80c8ca1851e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8E 10464 bytes