Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c1bfc70a799fde…

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 02:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1de81411eea7143e7a7903dca859d5e2 SHA-1: 1fc6f9c070a2e279741c586bf05d2dc87a22f7b1 SHA-256: f2c1bfc70a799fdeccea6a197cf343d27c966b75394590989ff8fd6715ff390d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://dafemum.ru/123?utm_term=maths+matrix+questions+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fd3811c2c803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5ff3e1bd2e9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_602ea6ec8a707.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/fibowobudoxoxajekanivuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484122/normal_6028673778131.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/28377373564.pdfIn PDF document text
    • http://mekozeka.66ghz.com/anstoss_3_gratis_vollversion.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/zubumizosewofan.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://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_6412e08d75f045f98b7d8c2ee19979c0.pdf?index=trueIn PDF document text
    • http://pepebejawu.epizy.com/bhojpuri_song_2018_ka_gana.pdfIn PDF document text
    • http://lifoluzosuzatus.rf.gd/agreement_of_subject_and_verb_test.pdfIn PDF document text
    • http://fenigubigona.epizy.com/ab_fir_jab_baarish_hogi_song.pdfIn PDF document text
    • http://banobozibijur.epizy.com/95315197381.pdfIn PDF document text
    • http://jonisijuxopud.epizy.com/sololumu.pdfIn PDF document text
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_1e2b5e2f809841009ebb2568ddaeea78.pdf?index=trueIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_2d3394f475334eab82222d38aa6af38d.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_8e8eb8bd1f4143e18623d12155c5f6e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/84593089749.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/myanmar_movie_free_apk.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_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 5424 bytes
SHA-256: 68cbd9bceabbef2673ce0553a86069e916f21c28ba61e8c1411d9339e8ede826
font_01_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 10548 bytes
SHA-256: 034e6ffec1a918341fc9e3671fa4ad117a4fad84c70b406cbb16fac07320f308
font_02_sfnt_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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