Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db59230e3d57190…

MALICIOUS

PDF

81.2 KB Created: 2021-03-14 14:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d0d1ed3b42ee34ff40d0d9275c47295 SHA-1: 9c62f4cd305a82f79d946d512fdc59ace7ba6548 SHA-256: 0db59230e3d57190881165b3c9e68ed00e945f660663e31f29f4854f31f78699
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The primary URL identified is https://botokaw.ru/strik?utm_term=mike+meyers+a%252B+book+pdf, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=mike+meyers+a%252B+book+pdf
    • https://wikiredapitij.weebly.com/uploads/1/3/2/7/132712416/4f1f24257b63.pdf
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/zulizopikifoke.pdf
    • https://wovegusokab.weebly.com/uploads/1/3/4/8/134850220/7839709.pdf
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/jasolososewijilet.pdf
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/5350991.pdf
    • https://redutoxaxijarow.weebly.com/uploads/1/3/4/7/134760413/4500238.pdf
    • http://zejenaxudemato.22web.org/exercices_sur_l_adjectif_qualificatif_pithte_et_attribut_ce2.pdf
    • https://xosebabonewita.weebly.com/uploads/1/3/4/6/134613761/5806773.pdf
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/3675494.pdf
    • https://sepolekabu.weebly.com/uploads/1/3/1/6/131606201/bitepaxuf.pdf
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/zojog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_bcc67ae827d94a698a4f9736518c2825.pdf?index=true
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_d3e10d118cb040bcb63370dd43c93d5d.pdf?index=true
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_a23e84b96174424eb5ced4ef812f4e3a.pdf?index=true
    • https://s3.amazonaws.com/norozovijalu/lerusox.pdf
    • http://baxogezupeg.rf.gd/l2_classic_adena_guide.pdf
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_83a0ecca21de489a8dca199d09f24a1e.pdf?index=true
    • https://s3.amazonaws.com/bolovopizonuki/jvc_wireless_android_auto_head_unit.pdf
    • https://s3.amazonaws.com/bogeguva/herman_miller_aeron_chair_user_manual.pdf
    • http://naremijex.epizy.com/jebizuwibevezasivew.pdf
    • https://s3.amazonaws.com/wukevirenesu/bottlers_nepal_annual_report_2016.pdf
    • http://tonubugiloroluv.rf.gd/the_perfect_stranger_book_summary.pdf
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_3b3fe9a18e4843418bb4ed4e3ee22125.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f016.bin
9d298711014fedd7f2bae2ae0023bd8d453b553b056a829a66dc4fe86109a21c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5068 bytes
font_01_sfnt_off0001014d.bin
1a61ba2b868980846ac9e8edeeca0b548ea1006f137e6eecd44972a7660e65fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 11640 bytes
font_02_sfnt_off000128d8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x128D8 4324 bytes