Malicious PDF — malware analysis report

Static analysis result for SHA-256 988dda70d8b1b3bc…

MALICIOUS

PDF

69.4 KB Created: 2020-11-11 15:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c47b936314467fedba19d54ad7bde8 SHA-1: 72e5fe79fde86d4b8d50c1d5de84cd759ec30a6d SHA-256: 988dda70d8b1b3bcf44ada3c0e12d78db5f9a08e7e7d4eb39b520acde9acbaee
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL, 'https://trafffe.ru/123?utm_term=act+one+scene+5+romeo+and+juliet+summary', is likely used for phishing or to serve a second-stage payload. ClamAV detection and ML classification further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=act+one+scene+5+romeo+and+juliet+summary
    • https://cdn-cms.f-static.net/uploads/4418778/normal_5f99bd7fd4efd.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f871dc2df539.pdf
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fa33e8126c0e.pdf
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/pelafogolobeteso.pdf
    • https://losazutuliwuja.weebly.com/uploads/1/3/4/6/134622760/wunovawezire_sigokoxorakoti_furumigufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ff5d509c-7d60-4596-af45-aaeff7cd7c54/pulew.pdf
    • https://uploads.strikinglycdn.com/files/d8fe4819-6824-4124-a0e3-7dc2306cbd76/self_inflating_balloon_experiment_hypothesis.pdf
    • https://uploads.strikinglycdn.com/files/62792b7c-cfed-4e03-93c1-a7f8233727f1/29905756090.pdf
    • https://uploads.strikinglycdn.com/files/b0c9b2e0-aa5e-4366-8d2c-d6ee960e25ce/33315355365.pdf
    • https://uploads.strikinglycdn.com/files/407a3241-adde-4efb-bf2e-8aa0a7a7f419/mountain_math_5th.pdf
    • https://uploads.strikinglycdn.com/files/cf5b8cff-6a47-4a90-88c7-d28775f2d3e4/wimezika.pdf
    • https://s3.amazonaws.com/wonoti/33370838320.pdf
    • https://uploads.strikinglycdn.com/files/dcb796b5-10ab-4e30-896d-f8ba7ba50761/dbz_budokai_tenkaichi_tag_team_ppsspp.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c2.bin
6540c36dbc37e9cf09346029d0e96f39d2daf0ebee45946b2b8ae9416cc1e57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C2 5256 bytes
font_01_sfnt_off0000d98b.bin
cade1832bae9147fbdfb2f8aa122513438b637431082bde20980ae93fc52e8d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98B 9668 bytes
font_02_sfnt_off0000faa3.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.