Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2efa5b971219db…

MALICIOUS

PDF

91.6 KB Created: 2021-04-29 12:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55f17fea6f6c9601254a4729f2d4853f SHA-1: 623b45121af1acb01d685422683732fedd014b35 SHA-256: 3a2efa5b971219db1b54c8e5d038682a85d01a20666e97e77bc009be3db0b929
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=shimano+ultegra+di2+r8050+%252F+r8070+gruppe
    • http://witikotuxigere.scienceontheweb.net/71404295922.pdf
    • http://hermidkovo.info/73640713502brh7u.pdf
    • http://leaninrzpd.site/49232049573hdffe.pdf
    • http://dezlice.ru/698660422965e6wu.pdf
    • http://tijudozi.scienceontheweb.net/download_english_picture_dictionary.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://spainwow.pro/5308665566zhi9o.pdf
    • http://mizizufiku.mywebcommunity.org/84971326769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c654c3bb-b1b4-47b2-92a5-1e17efbedea0/bose_wave_cd_wont_play.pdf
    • https://uploads.strikinglycdn.com/files/e67f4289-66a9-49d2-8479-121a11026678/6603421909.pdf
    • https://uploads.strikinglycdn.com/files/3c5eeee5-f46d-465f-bd12-a62597fd9217/how_to_go_from_factored_form_to_standard_form.pdf
    • https://s3.amazonaws.com/megujobemegor/chaya_o_chobi_bengali_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/c19ee652-f906-4577-b413-03814eba17ee/38857755088.pdf
    • https://s3.amazonaws.com/fewifuwu/94817285808.pdf
    • https://uploads.strikinglycdn.com/files/fed04327-8eb5-4314-9878-7db45218783e/zoled.pdf
    • http://pofijiserige.onlinewebshop.net/17913007996.pdf
    • https://uploads.strikinglycdn.com/files/1c589cc3-aec7-4424-99e9-3e6ad7cc75e9/84871293141.pdf
    • https://s3.amazonaws.com/retobifulipo/rurafebepi.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_off000112fd.bin
283b35d7f41805c68208e8aafde1f31d6918b6089b94f0045d1b3006b29922fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x112FD 5888 bytes
font_01_sfnt_off000126d9.bin
567ac84d4bb11476a0e0fb63fd12739d8db2761fa06f7824c88935fdd377b42a
pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 14724 bytes
font_02_sfnt_off0001530a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1530A 4324 bytes