Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e683b841da288cb…

MALICIOUS

PDF

74.2 KB Created: 2021-03-16 00:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c1afece63ea88b19ad6b03fa7d84b3b SHA-1: 5a02f384a9d228a2e5a8967d0b5751fefd3831eb SHA-256: 7e683b841da288cba387375452334c7b565012f701e06487f147a8c8661806a2
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 0.9998

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://nipisod.ru/strik?utm_term=nikon+dx+vr+18-55mm+lens+manual PDF link annotation
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/6249391.pdfIn PDF document text
    • http://shop-profildoors.ru/45346071632pdfbv.pdfIn PDF document text
    • http://msertis.xyz/what_are_the_conventions_of_thriller_genrecdtls.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/886118790417c4gd.pdfIn PDF document text
    • https://kijaxupujik.weebly.com/uploads/1/3/2/6/132695195/sisakatevopojo.pdfIn PDF document text
    • http://freshmind.net/what_is_cohesion_and_surface_tension0ckbg.pdfIn PDF document text
    • http://wibofot.22web.org/hp_psc_1315_cartridge_india.pdfIn PDF document text
    • http://optarfes.com/187872713984nqmx.pdfIn PDF document text
    • http://oneitstore.info/14881303984q0x3j.pdfIn PDF document text
    • https://jigadukux.weebly.com/uploads/1/3/4/6/134682377/gifibadokagewafeso.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/da0f5556-dc84-4dec-b0ba-357a28c0eea7/hx_stomp_3.0.pdfIn PDF document text
    • https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_402c8b0316fa41cca54846eef8737c42.pdf?index=trueIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_30c445e578a44911b73ed95ddbcca866.pdf?index=trueIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_a3a7f07470f54c909c8d3941bee0c2f2.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_f021cecfe19542f0a8c4b3045c1628ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7100b106-029e-4647-bbed-09a9ec3835b7/rejujotab.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_d7c0ce0bc61d4e4995268a5e05bfb429.pdf?index=trueIn PDF document text
    • http://guvenaverelud.epizy.com/liszt_la_campanella_piano_sheet_music.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_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 5532 bytes
SHA-256: b1b2fcad8591b54d6e5ef686aed48aed99016aa3d1209c84e6ce45d3294521d8
font_01_sfnt_off0000f674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF674 12840 bytes
SHA-256: 73e3793852294b8efe22fc29fea697e83b4d30eeda98e47aea7067c7ee948de5

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