Malicious PDF — malware analysis report

Static analysis result for SHA-256 a607a96e95010a55…

MALICIOUS

PDF

70.6 KB Created: 2020-12-18 11:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e484ac20e93dc8afbb26542b616a6b96 SHA-1: 98653466df9e90e39142cecfee93c58063ba2049 SHA-256: a607a96e95010a55676c119bee7735d11522c37f89c75522b169da265cb25650
126 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains text related to 'Janapada geethegalu video songs' and authoring application details, which are likely lures to attract clicks to the embedded URLs. No scripts were extracted, but the presence of numerous external links indicates a potential for redirecting users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://traffnew.ru/aws?utm_term=janapada+geethegalu+video+songs PDF link annotation
    • https://bimukata.weebly.com/uploads/1/3/4/5/134598529/wejonapefuw.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/zezofaxenuwixume.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/40b808dd9b7.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/39d873.pdfIn PDF document text
    • https://mafopobivo.weebly.com/uploads/1/3/4/3/134322173/be32af52e.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/431967b989f5.pdfIn PDF document text
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/9548140.pdfIn PDF document text
    • https://mivijupa.weebly.com/uploads/1/3/4/5/134578330/7330464.pdfIn PDF document text
    • https://vafumavuforowa.weebly.com/uploads/1/3/4/4/134489815/puzuzudinu-figiguni-vowaregeri-gezomedizuxu.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdff4c145a8629dc76f837/1606287181374/tomonanagurelaxorirex.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/posterior_hip_replacement_precautions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc79c85e71df64d6bd9c29/t/5fdc7b664ef20e41a29c34ef/1608285030681/pemupapojutuwenalos.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC871 5056 bytes
SHA-256: 1c1405b7d6f714865c11812b06435f2bbbf4c77ad5496a896d2e9de72c15c4c7
font_01_sfnt_off0000d99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99C 11332 bytes
SHA-256: bb2a05589038be6f4a374b8663f1fd32de098fe8d25f3898624c20e5b1183e54
font_02_sfnt_off0000ffa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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