Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9690fdefa41395…

MALICIOUS

PDF

88.6 KB Created: 2021-06-07 08:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b085d58eb71fcbfc79aca5abdd265387 SHA-1: aaa2f8abecbd2fb69e192d4eed0442367ad2b0c9 SHA-256: cd9690fdefa41395341d37f6c2235234303c736c95a07b0717396e0181d932ff
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The presence of a URL with a 'hookah bar song dj remix' search term suggests a potential lure for users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://dugedepap.ru/123?utm_term=hookah+bar+song+dj+remix++pagalworld PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417023/normal_603531c2964dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_60117be761ebb.pdfIn PDF document text
    • https://nizotuzuwiza.weebly.com/uploads/1/3/7/5/137507555/nabakizisixabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_603d8da5d53d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_606e3e1a521c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5fdfbf9f3a397.pdfIn PDF document text
    • https://gowokijisamupu.weebly.com/uploads/1/3/4/4/134438950/wimokat_telira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_6027afa47b41b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_600c9dde9be84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488336/normal_5fe472fb6bd21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feteselulo.pbworks.com/w/file/fetch/144470664/81644984030.pdfIn PDF document text
    • http://punumiboxo.pbworks.com/w/file/fetch/144718227/how_to_hack_farmville_2_country_escape_with_lucky_patcher.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/how_to_play_odm_file_on_mac.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/gominas.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144412056/vobobevedotikire.pdfIn PDF document text
    • http://wenitudodub.pbworks.com/f/zipudotode.pdfIn PDF document text
    • http://rixepal.pbworks.com/f/duzokefuxidaruzaz.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144616053/98357245019.pdfIn PDF document text
    • http://favixose.pbworks.com/w/file/fetch/144533427/common_noun_and_proper_noun_examples_for_class_2.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/favoparav.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/w/file/fetch/144536757/wixuk.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/w/file/fetch/144529845/pilamadixedepaleze.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5776 bytes
SHA-256: 6639ac32ae6600b6e2f653edc5641b61fb09b80f5ddd01b11d8195b4764daaf6
font_01_sfnt_off000101be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 6580 bytes
SHA-256: 219f080e76fd9974d7d2c5d8389ae8a0cafdb82b8cf9fb6e914e0207dcf369f4
font_02_sfnt_off0001187c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187C 11320 bytes
SHA-256: 910a4d75b560171d7fda896c5e1fc4fdb39ccaeccce9c3ef9009654f9f8f9105
font_03_sfnt_off00013f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F59 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf