Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e5961c0d28f1da…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 19:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6e09a91de1bbff9e4a6d4765cbd12cec SHA-1: c368564aee4fa156f3987839ba265ec7b4ab00c1 SHA-256: 32e5961c0d28f1dab968ab65a6ba139d315f6babcb738800e48c7670bba73586
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, forming a link farm, with one prominent URL suggesting a lure for 'apk need for speed no limits'. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded content, though heavily obfuscated, likely serves to redirect users to malicious sites for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://jacksth.ru/wix?keyword=apk+need+for+speed+no+limits PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5fc852d850b5f.pdfIn PDF document text
    • https://gupolapi.weebly.com/uploads/1/3/4/6/134629895/zeketetirugiwerif.pdfIn PDF document text
    • http://my-favshopf.online/diableros_zombie_rpg_shooterol1cw.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/fezupejawusirokete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_600a8da254285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484370/normal_5fd690864ae5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5fe049d6a52d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5fe87f20c2fac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471706/normal_5ff30078d38b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5fcceffe6659a.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/zimebogesarudiru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_60067ffb7be3e.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/jazuravazaguz/bsc_agriculture_notes_tnau.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/beauty_camera_app_for_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/pafiduganasile.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/44344806809.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_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 5032 bytes
SHA-256: 00ee7ec285ed070ddf159d0ff814491900a6449b2699d606e686f6862e507288
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 10636 bytes
SHA-256: 28c3d1f3c39e0a27f963c0c8d2d2faea392585588b63c568f391e56ffc016331

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