Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb50c397a0fdf00f…

MALICIOUS

PDF

68.7 KB Created: 2020-12-22 13:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b891f1a270e56b2bffcff8e0df6aa61f SHA-1: 1c8737e08a90e800164128c08eda3c40a3a16495 SHA-256: eb50c397a0fdf00f29b5ecc83bc48daa1072925d233c8cf04e39603b7d8a6385
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 one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Indonesia business outlook 2020'. The presence of numerous links and the malicious redirector strongly suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=indonesia+business+outlook+2020
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8e09e013676.pdf
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/sejumeronarabiluxe.pdf
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fdae4188f8d3.pdf
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/jesase.pdf
    • https://static.s123-cdn-static.com/uploads/4387932/normal_5fc753b59dee4.pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fdb012ebb09a.pdf
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/wibokunagis.pdf
    • https://cdn-cms.f-static.net/uploads/4491933/normal_5fb255bf3558e.pdf
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/duwupixewimaj-bolalezux-vozer-kumed.pdf
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/3312254.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0d9a4f78-9a50-42b0-a9d7-7f124e6d9dc1/farezuworitozezar.pdf
    • https://static1.squarespace.com/static/5fc566ac3dfdd95b60f3409b/t/5fd111fa40577858cf311cc4/1607537154015/nirawujenom.pdf
    • https://uploads.strikinglycdn.com/files/21846acd-bd29-4b95-94e5-aaa20b65f2d8/san_elijo_campground_reservations.pdf
    • https://s3.amazonaws.com/jarawaxanivu/fegen.pdf
    • https://s3.amazonaws.com/dirijazi/34249821895.pdf
    • https://uploads.strikinglycdn.com/files/8dce3fea-3bc9-4953-b8cc-c8b49d825d26/honda_hobbit_manual.pdf
    • https://static1.squarespace.com/static/5fc532aedf132613bbd9a2a5/t/5fc5fa8a145a8629dc7f58fc/1606810251483/65039458533.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d06c.bin
8bd6f95b1c57432257d28faf4c0e48bba4d8de6ec23bbf83d25669fdb494fc35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD06C 5140 bytes
font_01_sfnt_off0000e1f4.bin
5c8bf31d7bfc009c0c010e084650bdf68e4ab48895049daf2221ba49b39de8c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 10528 bytes

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