Malicious PDF — malware analysis report

Static analysis result for SHA-256 e122b09cdc200334…

MALICIOUS

PDF

67.0 KB Created: 2021-03-15 00:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 014eb93eccbd5c6c1057475844023cb9 SHA-1: 02acd9bf8b09bece14bd642e33fdd49479ee2c10 SHA-256: e122b09cdc200334b3e84ba31d326f367587ebe0ebb1a8d894b4dc3556f28e9f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'random sample worksheet'. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=random+sample+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fe88cc266977.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/hM85Nji/jumbo_rummikub_special_edition.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/nofosezupibe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5fe5b91528637.pdfIn PDF document text
    • https://vizifota.weebly.com/uploads/1/3/0/9/130969876/ddf6c831431.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/GugcwcV/57837144966.pdfIn PDF document text
    • https://detaseruwef.weebly.com/uploads/1/3/0/7/130740376/pepaminebugubegexivu.pdfIn PDF document text
    • https://cdn.sqhk.co/rawolobi/gdgghbT/cdc_guidelines_isolation_precautions_2007.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/7700c4b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_6046220a62bb3.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/iiirJie/55027438287.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/a7b07e3b23bdd92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84bd5de-82a3-4716-9e1e-937577fe73b8/41000919857.pdfIn PDF document text
    • http://zagebixomibolo.rf.gd/59137678846.pdfIn PDF document text
    • http://xubexiv.epizy.com/nixasujeretipezos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d01390-1dee-4ccd-baf4-47ca589b0e15/video_gallery_for_wear_os_android_wear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88357d1e-d448-4fd4-9cc8-6065ba396749/jusegivowowope.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/52305636666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3abec96a-6698-46df-ae24-296cd9e40872/report_writing_format_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/ruwigevuranuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dcaa48-b5f9-4707-98ef-69fb9afc5642/zovixizotedebigibikul.pdfIn PDF document text
    • http://xigoraviwa.epizy.com/61188314634.pdfIn PDF document text
    • http://fujesotes.epizy.com/cessna_150j_parts_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA00 5364 bytes
SHA-256: 0adc882b20351f4aa5920592c9dc3714ef64493e59c0e47148bd7c1093fc10ae
font_01_sfnt_off0000dc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC27 10348 bytes
SHA-256: 7a93d1b16adbe5548b479f2d98214b16923fc94529f58fdc4398fb57a0c03053

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