Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c3d198dfb57ba7…

MALICIOUS

PDF

152.7 KB Created: 2021-03-29 09:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 193fb442326c3033c50a42c0cb632cf6 SHA-1: 90009ab8440d84fe1bb2a9cfc70827f2c9f6390e SHA-256: 88c3d198dfb57ba7732ff23c33603cd249c989822893a22b731e33b1afe0ee29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://jumiwimov.ru/wix?keyword=who%2527s+afraid+of+virginia+woolf+pdf+free PDF link annotation
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/poxisetevibow.pdfIn PDF document text
    • https://defuzeje.weebly.com/uploads/1/3/4/8/134883556/6831829.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/erT4ihU/elderly_ppt_template.pdfIn PDF document text
    • https://wobanuwu.weebly.com/uploads/1/3/5/9/135959505/kelukifujagipeb-tupipenotow-kerivufetid-mudesogazof.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/3564548.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/iewXjhV/sushi_catering_miami_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/cDcQmP5/11611957375.pdfIn PDF document text
    • https://xawewidijaxiju.weebly.com/uploads/1/3/4/2/134266046/1637e9ea1403.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/dha9haS/5006053752.pdfIn PDF document text
    • https://fofosefekilom.weebly.com/uploads/1/3/0/8/130813764/5a4a0a7af7f8e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/hiX0ijh/pafinerugu.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/fotunafofufabomuxabi.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuvalapowa/JLyigha/ketemakipamofezatebet.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/6ifDjh9/gawirawasobonopupador.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/davuris_rukigumo_fotik.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/lidyEhc/xebajotoniremotemitobaku.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/d97b92f9e58ff8.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/cmgy3qw/zen_pinball_fx3_forum.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://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_e6b8e22c73a24749babddb3ad57155f4.pdf?index=trueIn PDF document text
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_cf75a2790f024dd9945d4bd4d603d834.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legesiliv/nosur.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/zarote.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_1042c39dd87f46f9a2e4ee44221161d1.pdf?index=trueIn 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_off000207ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207AE 5208 bytes
SHA-256: 8d7d06ed2ee912b2d40a6368c314e175845b5826648fd7e75db59bc85ab808e2
font_01_sfnt_off0002197d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2197D 13460 bytes
SHA-256: 43960e927e3a32eb901fd692a479fd4c984899b6b59fa49e41c9e870b87084bf
font_02_sfnt_off000244f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244F9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.