Malicious PDF — malware analysis report

Static analysis result for SHA-256 5937ae910c558195…

MALICIOUS

PDF

88.3 KB Created: 2021-03-18 08:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf3cb4351ef5f7e1c80a0e05cd488e3 SHA-1: 7b972eb1507e4138eaf9591f2d8317108b044f2e SHA-256: 5937ae910c558195f278ae7fa019628294d2bf35887fb265b83b69366c87b70e
156 Risk Score

Malware Insights

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

The PDF document contains a link farm and a search query for 'snaptube download apk iphone', suggesting a phishing or malware distribution lure. The presence of numerous external links, many pointing to Weebly-hosted PDFs, indicates an attempt to obscure the true destination or host a large number of malicious files. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to embedded malicious content or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=snaptube+download+apk+iphone
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/ff7416.pdf
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/c317d169bf.pdf
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/juboleza.pdf
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/xaronip_vevip.pdf
    • https://jifibixivedud.weebly.com/uploads/1/3/6/0/136082986/mobexoxepiwori_nuxawepimorinex.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_60464c8220114.pdf
    • https://cdn-cms.f-static.net/uploads/4387050/normal_604459966413f.pdf
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5fcc8c062879e.pdf
    • https://jutewalezozapon.weebly.com/uploads/1/3/4/0/134016751/3212068.pdf
    • https://xuzelete.weebly.com/uploads/1/3/2/6/132681171/812501.pdf
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6011a575d2a30.pdf
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fedc8534e495.pdf
    • https://static.s123-cdn-static.com/uploads/4424637/normal_5fffcf632f6f8.pdf
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/6e84be.pdf
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/vesuxomaxasolosiwase.pdf
    • https://cdn-cms.f-static.net/uploads/4481539/normal_603957f7032ad.pdf
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/6d68257d.pdf
    • https://cdn-cms.f-static.net/uploads/4375339/normal_60112e6cd94a0.pdf
    • https://cdn-cms.f-static.net/uploads/4475741/normal_6049f513ec404.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_fc187ebc976941dc947fbfbc0061ed4a.pdf?index=true
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_588b55dd92774937ad06199ca97eb773.pdf?index=true
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_4155da8431524539a672c683fe306bf1.pdf?index=true
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_1ee2db7f0c8c4df6914ffd65e7c0dbb4.pdf?index=true
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_1a014352e3194daf9ab547f95d9ff26d.pdf?index=true
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_fb18fef667a947aba588f5bb5c06d326.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_off00010dea.bin
d327d6a2a40b69d179cef8adf84f16a527150b75279226a3ba38e55058c8846c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 5052 bytes
font_01_sfnt_off00011f13.bin
2a050bc56806af1bb8dcef9ba1a7eb416dfff26a677ace447efef80b246ad953
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F13 11308 bytes
font_02_sfnt_off00014579.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14579 4324 bytes