Malicious PDF — malware analysis report

Static analysis result for SHA-256 0734253932d820bd…

MALICIOUS

PDF

81.2 KB Created: 2021-03-11 10:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4dc68284412182307eb756d1f6ec4e98 SHA-1: 3004a8196d31aa23f3976203948fcdcf013b45ce SHA-256: 0734253932d820bd3b2861cb0ab34246e8edc24385a177f90f8a164465d3201a
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware. The document body, though heavily obfuscated, contains text fragments that appear to be part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/award?keyword=bangle+sellers+critical+appreciation+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496148/normal_5fd32f7a19ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60230f7db503d.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/boronulovixan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_601580944b1fd.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/how_to_use_my_black_and_decker_drill.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/understanding_comics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387938/normal_5fde3b2f8ec23.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
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_367d94ecd2c0461eaf78c418ca1c0e04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/zorovabugijiziratusopo.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/ludoxadogol.pdfIn PDF document text
    • http://xokesuluz.epizy.com/validity_sensors_wbf_vfs301_driver.pdfIn PDF document text
    • http://fenetidataj.rf.gd/fowobawawinefifetobi.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_b397c86bb1604faaaf5d347b0d5762cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/murudute/online_pl_sql_code_formatter.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_off0000f511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF511 5160 bytes
SHA-256: f3718d6f2cd83a31cfad8abd1b8098106a3f15e93657f600b21edfb88f3dae6b
font_01_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 10032 bytes
SHA-256: 019c9f76ac4e14bf7c8402a88a6ac15a21fb87c263cc6dbeda53bba60d566681
font_02_sfnt_off000128f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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