Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfba7d3bc17920f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-15 07:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cc644941f4bae7a5be8b4c51df30294 SHA-1: 9aaf2fb1fefbbbe0a97c7fa8f2f15117c892fc64 SHA-256: 0dfba7d3bc17920ff88593348f0ef0a0d0a5fa77093926e0efc76f9501aae45e
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to email unsubscribe links, likely intended to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://gimoguvi.ru/wix?keyword=how+to+create+an+unsubscribe+link+in+an+email
    • https://cdn.sqhk.co/rajexizeba/ehibjdl/kamefazigekebud.pdf
    • https://cdn.sqhk.co/gawukale/djhghgh/23416452261.pdf
    • http://dovulup.iblogger.org/lubemin.pdf
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/763489.pdf
    • https://cdn.sqhk.co/xamitarerivu/ihjjdUZ/best_stone_tiles_for_kitchen_floor.pdf
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/3360923.pdf
    • https://cdn.sqhk.co/vafodagusun/rhgUjjj/68991383251.pdf
    • http://hempmap.ru/suxojujaban3oit.pdf
    • https://cdn.sqhk.co/gixedomawa/hTGhdjg/happy_fall_image_with_dogs.pdf
    • https://xisofufewazexi.weebly.com/uploads/1/3/0/7/130776718/puvajavovovadisidam.pdf
    • https://cdn.sqhk.co/zojoguxuban/zhgk0jj/93913312779.pdf
    • http://itrom.fun/24853405946rqhfe.pdf
    • http://mutupezag.iblogger.org/casio_ctk-1550_price.pdf
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/gajotibuneduzab.pdf
    • https://cdn.sqhk.co/fupupusamun/gj1uibv/14428548227.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://togewogovimome.epizy.com/77854819206.pdf
    • http://zorijofoxafa.epizy.com/chucky_hd_photos.pdf
    • http://rawonuruked.rf.gd/first_things_first_rip_uncle_phil_for_real.pdf
    • http://worupowa.epizy.com/camera_gadgets_for_android_phones.pdf
    • http://mafizili.epizy.com/96748269275.pdf
    • http://nodefojabotozij.rf.gd/napuzuwefonil.pdf
    • http://pejatopofir.rf.gd/alisan_porter_songs.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_off0000fb8e.bin
e6e26bf8dbddcf90ba3b29f1ea36a29e8d8ad53029df84c269444391a7d136c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8E 5200 bytes
font_01_sfnt_off00010d38.bin
022d0d6aeff7e8aa8c1e808de16646d71abe529015e08d648b7e98ae8a3ed99c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 10876 bytes