Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c7d034d3c907fb…

MALICIOUS

PDF

74.6 KB Created: 2021-04-06 23:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5757b733988c5a0cdfe79869f163ef00 SHA-1: 3df898e13852a1052f66057657a6503fcd32b503 SHA-256: e5c7d034d3c907fb330e54218bf0c900e0de9c717577526c1b6111c4eec4a0c1
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing lure designed to lead users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=collective+nouns+worksheet+grade+4+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421637/normal_601007af2992d.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/TlSxOvQ/free_ringtones_rock_songs_new_2019.pdfIn PDF document text
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/sevuzuxogevox.pdfIn PDF document text
    • http://xorirule.22web.org/diwurekufomiritidalese.pdfIn PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/ligeze_fixojave.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/Qgfjcjg/jolulizubimonogoz.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/vasuzuzoxibiwave.pdfIn PDF document text
    • http://vutajazelige.medianewsonline.com/13187394866.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/jurnal_materi_pendidikan_agama_islam.pdfIn PDF document text
    • http://picsonair.com/atc-_800_temperature_controller_manualgdbuo.pdfIn PDF document text
    • http://indital.fun/husqvarna_viking_sewing_machine_h_class_e10d2vif.pdfIn PDF document text
    • https://cdn.sqhk.co/dexujagafir/jihgV3n/36906552382.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/6134564.pdfIn PDF document text
    • http://delayikapy.xyz/the_prince_and_me_1_watch_onlinegzfxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375531/normal_5fdfcc1419835.pdfIn PDF document text
    • http://vegimawubukuwon.22web.org/boards_and_beyond_slides_reddit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444885/normal_60353dcbb61a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370307/normal_6007f1089c541.pdfIn PDF document text
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/a7cc213261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bidajalej.onlinewebshop.net/23425825074.pdfIn PDF document text
    • http://xazoviwupudowol.rf.gd/16607641245.pdfIn PDF document text
    • http://lavapokapajemob.myartsonline.com/storytelling_livro.pdfIn PDF document text
    • http://baloxes.epizy.com/lomelufolasuk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD785 5624 bytes
SHA-256: ed678a758de5a87062d80b63bd60596f50d7c138b4da13c9654ed59fe3a81577
font_01_sfnt_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 10440 bytes
SHA-256: 3b924bbe1bb03b91077c70b65d885ff536bdbc769dc1d4fd265e6e17a7317bcb
font_02_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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