Malicious PDF — malware analysis report

Static analysis result for SHA-256 0063614c521fe681…

MALICIOUS

PDF

75.7 KB Created: 2020-11-21 19:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 892ce17233ee575fb1f56f36ea7a146c SHA-1: df947b5d461ba850d0392d881c5419a8281f2b6b SHA-256: 0063614c521fe6813e1bee24dd535cf374beaaf7d0e6a043a0c9fa5c177f65b4
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://traffking.ru/123?utm_term=watch+interstellar+online PDF link annotation
    • https://nilorajokurede.weebly.com/uploads/1/3/4/6/134626806/bf1dce433457cc.pdfIn PDF document text
    • https://novafexoxola.weebly.com/uploads/1/3/4/4/134400343/magaxos_jawuj_sajuzeme_faxojibenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5fb5eeb4cc09d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f8e08221513f.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/4764212.pdfIn PDF document text
    • https://forovaze.weebly.com/uploads/1/3/4/3/134315943/mupuvipinukafi.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/1037332.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/xetezivineker.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/e009865a-a059-4b90-a32e-b95b4c875c12/wiluviviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404faa0e-d2e0-4a96-aab0-731b2407b900/20686881115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2824d67f-0a6a-4f6c-9e24-de5d0a7f280c/fitosaxupogudezumur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2032b20a-dfa5-4830-a0de-cb17f49e6672/safenet_ikey_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a23aaed-9a91-4a2a-969e-9c649ce53add/styx_boat_on_the_river.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/72532708751.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_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 4900 bytes
SHA-256: a2387e36ccc9a58875ff49d247fca7d45a45b8480acf59b50d8c069371ae1c98
font_01_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 11028 bytes
SHA-256: 4a2e6c3283278c4eb458469e20846c4b49a17cbf3420fd398986354b32bfb367

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