Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfc2b7f8748a9dc…

MALICIOUS

PDF

83.1 KB Created: 2021-01-13 14:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cc24ffd19b6a7e9fe9c2ec0a8e55c7f2 SHA-1: 2597f772da3d82a596e9c844cefe68b6cc679022 SHA-256: bcfc2b7f8748a9dc0cf80a251341ae07529a0d633fdd1c592de43b82f3aae611
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the embedded links are the primary attack vector.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=badlapur+film+song++pagalworld In PDF document text
    • https://cdn.sqhk.co/momujolo/Kpjbb6D/retro_games_for_sale_south_africa.pdfIn PDF document text
    • https://site-1179316.mozfiles.com/files/1179316/dangerous_dave_3_apk.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/693417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fea450aefe74.pdfIn PDF document text
    • https://site-1168222.mozfiles.com/files/1168222/jurassic_world_ios_cheats.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/favosinajefexi.pdfIn PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/sofoneti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_5fd862ff7f571.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/0ae745138.pdfIn PDF document text
    • https://site-1235418.mozfiles.com/files/1235418/design_furniture_gallery_st_albert.pdfIn PDF document text
    • https://cdn.sqhk.co/wemigiwim/paiiQib/48139357096.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/tipikaxe/tisogizir.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/14833123400.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/ap_scert_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/muxejewiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 5504 bytes
SHA-256: 8aa607261185afe75a3d656ebfb81a737c6d2ae87da3254b17cc1cdf54600642
font_01_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 11572 bytes
SHA-256: 72888f9d6c51f29773208be6a96ee993236e0668cf6bcbafa78c8e93aa390a03
font_02_sfnt_off000129e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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