Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7986ab91b4306f0…

MALICIOUS

PDF

126.9 KB Created: 2021-01-21 10:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5b45e82968196b8d3c6ad357bff84a9d SHA-1: 61fc0f3c1604031de2fb47e8a3bab738498a2a87 SHA-256: c7986ab91b4306f004a04ae3f9ad0042f458b510255ce42983251c9e02ad7ca8
156 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 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=the+social+contract+rousseau+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5ffc1b7588619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401972/normal_6003eb9a07fce.pdfIn PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/factory_icon_free.pdfIn PDF document text
    • http://zuluwana.iblogger.org/41110702008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5f94a44f7d35f.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/9625654.pdfIn PDF document text
    • https://site-1172077.mozfiles.com/files/1172077/john_wick_director_snowball_fight_iphone.pdfIn PDF document text
    • https://site-1174138.mozfiles.com/files/1174138/47385553570.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/53196117d9a8e1.pdfIn PDF document text
    • https://site-1180367.mozfiles.com/files/1180367/92543742880.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/vugibigazofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f9009cbc6bd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotizifime/scratch_2_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/tru_talk_video_free.pdfIn PDF document text
    • http://zesufes.epizy.com/99199718135.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/brutal_age_mod_apk_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/65531048951.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/canadian_drone_test_study_guide.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ab86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB86 5192 bytes
SHA-256: 7b6a3bdb0d55987ec0d64dd2bd0e8274fec9ab3bb17d322c9aad5c5322aa5602
font_01_sfnt_off0001bd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD25 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0001c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C888 11176 bytes
SHA-256: 274b178b3b0a0587a581b3e74e3588454c7bedbc240eec10c2a7b1387baede18

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