Malicious PDF — malware analysis report

Static analysis result for SHA-256 1048dbad45de501b…

MALICIOUS

PDF

80.9 KB Created: 2021-03-07 01:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: de29c3a276b128e5891545c28c7017c2 SHA-1: 0c6c77cd0a6f25048e762781a37b438219025e40 SHA-256: 1048dbad45de501b2fd7588efcd7c73e180e54b3c4db98f2dafe0bb581e7e955
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing sites, aiming to deceive users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=trading+harmonic+patterns+with+technical+analysis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414860/normal_601180478314b.pdfIn PDF document text
    • http://coupons2020.info/purpose_of_balance_sheet_reconciliationy6zpn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fc9c0e674f7e.pdfIn PDF document text
    • http://herss.space/35454821456gg6s8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5ffd48673a073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416131/normal_6005be5a4c9d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401697/normal_6006e15315b26.pdfIn PDF document text
    • http://prosale.company/vumizaxeluvufoji11el7.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
    • http://luturuwuxas.epizy.com/59100378909.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_5092987bc7a84f9d9d1a5ee977f5f3b0.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_4e8a4f7bea6c401c8302b978f60e3782.pdf?index=trueIn PDF document text
    • http://vofuwelezetez.rf.gd/hazmat_school_test_answers.pdfIn PDF document text
    • http://nasuxenabo.epizy.com/tatasedaxagur.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_4924f7a7e26c49639b8f19bc2c3de583.pdf?index=trueIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_f59c1cc53b68427e8e998b5a76aee39c.pdf?index=trueIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_a1b4fcb372624ad48796634bcc4d7503.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_f85300ea84084c7eb781eda978f922d4.pdf?index=trueIn PDF document text
    • http://bokakemipik.epizy.com/apple_support_s.pdfIn PDF document text
    • https://b56e6f12-3f4b-4b75-bc29-9585eb3fba71.filesusr.com/ugd/73f0dd_71718c844ed24562b723cd70cd69de77.pdf?index=trueIn 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_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 5500 bytes
SHA-256: 5becc39b61b5c429e8325315dc7d1427a5c16abf136792e58e8c79b0b247506d
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 10516 bytes
SHA-256: 8c5eb8adcfe3fffc42dec18cfb8b9c4157d6a1b44e2a8f2deb03000a3172ca90
font_02_sfnt_off000127cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333