Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c64c38cdef0b259…

MALICIOUS

PDF

70.2 KB Created: 2021-03-28 19:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 60ee655de660452e668aa2b79093ed12 SHA-1: ee0bfae0b9edab73d09107459241480ccec6c535 SHA-256: 6c64c38cdef0b259b51e58c5bc1b1e516844e814d6d4dfc603842f73c23d5237
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://leonvi.ru/wix?keyword=living+environment+regents+answers+june+2018 PDF link annotation
    • http://lonemap.medianewsonline.com/android_espresso_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_6052a5bbdc3eb.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/tear_soup_book_barnes_and_noble.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/dijatorosumeponenipim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485704/normal_5fe01b988eb78.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/10459578800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_6036cb3cb0265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_60452c19899c4.pdfIn PDF document text
    • http://tulutita.sportsontheweb.net/96517024392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fd39ba55a382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_605a1006bde63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_5fe2794c6e5b2.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/rumezo/libaxasagewola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6733cddd-eece-406c-9527-9c9846c74d45/how_many_calories_are_in_a_sonic_hot_dog.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/34710883471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5154d5-4498-4855-9b20-450b1e2ea1f9/27885778446.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/95327718933.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/analisis_del_libro_un_puente_hacia_terabithia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8d8300-8c31-4865-9fba-c66441bc1b81/58424869380.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/munugewasi.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_off0000d51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51A 5664 bytes
SHA-256: 0daf69df9df44b547eaf337f1318e12778a799b1458f00eaf00c69040fb5ee54
font_01_sfnt_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 10296 bytes
SHA-256: dc933be198c5d80cebf1cfa92b85c78854dc29c7a8a65aab99968a279f725f08

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