Malicious PDF — malware analysis report

Static analysis result for SHA-256 021cdbdc041a7871…

MALICIOUS

PDF

88.1 KB Created: 2021-03-24 07:31:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 62d13a9dfd4491ec40e5a1789ce68bee SHA-1: 1fe404bb25840e479ee55e9e1b17120549aa5094 SHA-256: 021cdbdc041a7871eba47e6fb91b635964fddc2330133db923c6f2711ff70a12
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=nccn+cervical+cancer+screening+guidelines+pdf PDF link annotation
    • https://cdn.sqhk.co/kelopifagisu/nidjeji/57027491229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_6015dc9906a17.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/eN3ujcA/two-_way_traffic_phrase_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/disarelas/d5hjjgo/police_siren_ringtones_for_lg.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/x83iaic/abcya_red_warrior_level_9.pdfIn PDF document text
    • https://dariwatipizodaf.weebly.com/uploads/1/3/5/3/135323996/xekuwodanimaxuja.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/vaporageg-kikesefaxinu-puvoketapivotod.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/hiJijH3/4_games_in_one_app_offline_apk.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/50489.pdfIn PDF document text
    • https://cdn.sqhk.co/woragumokewi/5hd9jj5/sozujixogabof.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/guBhgpf/41972488244.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/bodujanese.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/ijc7ges/formula_1_racing_drivers_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_5fca816f78447.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/ath1Nhf/slay_mama_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_6013eb5612d04.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/xKhciiL/flight_club_jordans_real.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/BIjgfgg/swordfish_attack_shark.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/2Arjddy/61684379176.pdfIn PDF document text
    • https://cdn.sqhk.co/biserodafed/jjgibkl/batho_pele_principles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fa4494-03c8-4013-a3ad-664d26502640/bovazefuwokisiberi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8aa11d-bdf1-4707-91fd-0c7d10b3161c/79305877710.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 5352 bytes
SHA-256: 7c4c58ea9d10c35a50afa8fc817f882aada8c6e3a2acfb13f0fc50c3f1719f46
font_01_sfnt_off00012e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E69 10688 bytes
SHA-256: 89bcf802269a11457bc2f9515e7272625213fd4e65247582df70c583ea4e8580

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