Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad260a19451746fe…

MALICIOUS

PDF

73.1 KB Created: 2021-04-03 05:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba64efa3b280e091f32d03674b470bc6 SHA-1: ea1174158b3ddb19b46744a17e46784bac6bcfd9 SHA-256: ad260a19451746fec285106edaea8071ebb31a06fa2c552161a96855e25d7dff
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/123?utm_term=angular+material+form+submit+not+working
    • http://opencabinets.xyz/folarinexodasidiberefm2ash.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://luminar2-download.xyz/38579071380dmup1.pdf
    • http://pogibofabut.getenjoyment.net/wodajinomijepiwositab.pdf
    • http://likelid.xyz/point_blank_hile_indir_gezginlerybfu1.pdf
    • http://businessoutsourcing.info/vefukudevibuniwolojasa09nxa.pdf
    • http://jopkapopka.online/dirt_devil_power_stick_sd12530_all_around_full_power_cleaner5e1js.pdf
    • http://thedefenseforge.com/manual_de_formulas_matematicas_fisica_y_quimicanst4a.pdf
    • http://mezajozugabaso.getenjoyment.net/38242591448.pdf
    • http://kujamemapevubu.mypressonline.com/warhammer_40k_8th_edition_adeptus_mechanicus_codex.pdf
    • http://sellforce.ru/fuferugozataxamqle3.pdf
    • http://fatunatet.getenjoyment.net/embroidery_stitches_free_download.pdf
    • http://ayazshabutdinov.club/where_is_the_model_number_on_a_furnaceof34z.pdf
    • http://clubstore.pro/lefovikuv6uiq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kotenu/human_trafficking_organizations_in_texas.pdf
    • https://s3.amazonaws.com/titugome/78188257668.pdf
    • https://s3.amazonaws.com/luworizesupox/79209585710.pdf
    • https://s3.amazonaws.com/dazuxujepov/autocad_training_exercises_for_beginners.pdf
    • https://s3.amazonaws.com/toguvaju/69197848518.pdf
    • https://s3.amazonaws.com/punurum/piano_finger_number_worksheet.pdf
    • https://s3.amazonaws.com/lebaxa/faxirifolofexebadobew.pdf
    • https://s3.amazonaws.com/rebesudanolo/secret_video_call_recorder_apk.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_off0000ddfb.bin
05318de2e0251ca426500648ef803990cf49654affe4c2606ee06d0da2fd4556
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 5372 bytes
font_01_sfnt_off0000f049.bin
e5f3d0e812884a226486ef8e547642685fed2bbb0087b027ae72f830ad8c698e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 11316 bytes