Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79e1de14923bce8…

MALICIOUS

PDF

43.0 KB Created: 2020-11-08 08:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5c73310eac651e810b3698a12570ca6b SHA-1: d8bd31d94909d742d204779e96296bd6fdc0b560 SHA-256: a79e1de14923bce8f3db94b0da5c459930c81c4302b83d721ac17d5753f1a783
96 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 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 1.0000

Heuristics 4

  • 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://traffset.ru/123?keyword=adult+posterior+fossa+hemorrhage+icd+10 PDF link annotation
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/tefowa.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/4495c5a.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/8be4d78a-ec18-42e6-92d8-e658e77d2f46/intempo_bluetooth_speaker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/soul_eater_arachne.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/46693329901.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/zidajijesefalubunur.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/23100762748.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/kerujepaweremomobimiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f676237-870e-40f6-a3d2-821e50c69212/sfatlar_konu_anlatm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55b52e4-913e-4065-8022-349bdbe624be/66632489643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed49cce-d855-4b0f-a983-5a06674d743e/darkest_dungeon_ship_s_figurehead.pdfIn PDF document text
    • https://s3.amazonaws.com/konimowu/fishing_leveling_guide_ffxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c64fb94-e954-4363-90fa-1425ce03cd01/sazumivivedazasabubefelaj.pdfIn PDF document text
    • https://jufabiset.files.wordpress.com/2020/11/ingilizce_yazlm_hrszlk_hikayeleri.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/62349847004.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 5752 bytes
SHA-256: 23643f7adcda9c4170d830c68edabaa304cf8c1a60de72723f7d6db9a88bca52
font_01_sfnt_off00007c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1E 10308 bytes
SHA-256: a69a7a3f8a809a7b569cf00f2873b304583442f48c0202fe018b8cafa8d24626

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