Malicious PDF — malware analysis report

Static analysis result for SHA-256 f406144efefec4e8…

MALICIOUS

PDF

47.2 KB Created: 2020-03-29 10:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de75d9150be36cfbab26295c2f2136fe SHA-1: 9d3f8a2315e7bafca298c2777d165afbb2cf0b01 SHA-256: f406144efefec4e8d6a3358e544801fc2b1bf0d7e7b11720c7271cd6b2c941aa
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to these external resources, which could host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://mx.grandsalinelibrary.com/uploads/1/3/1/3/131379042/131379042.html#icd+10+code+for+bone+pain+in+pregnancy
    • http://101sarah.com/uploads/1/3/1/1/131163976/korarugubafapud-xapomuduxuxobam-fowozid.pdf
    • http://cbcosmetics.net/uploads/1/3/0/4/130436159/wuluramim.pdf
    • http://rokuhispano.com/uploads/1/3/0/2/130289226/2d6ac1876cddfc2.pdf
    • http://amashengebusinessholdings.co.za/uploads/1/3/0/5/130590589/panimamutaji.pdf
    • http://studentcenteredclassroomassistant.com/uploads/1/3/0/2/130287995/femerudaxavetapa.pdf
    • http://khyeung.com/uploads/1/3/0/9/130969950/cdf18e8e14f0898.pdf
    • http://www.appcallservice.com/uploads/1/3/0/3/130379424/2508828.pdf
    • http://3mrentals.com/uploads/1/3/0/4/130488196/gugajasagoxufeduvu.pdf
    • http://sparklecleannwa.com/uploads/1/3/0/7/130776823/d2eeeb416.pdf
    • http://bubblingbrinebrothers.com/uploads/1/3/0/6/130605168/lawalezebivezoluwuba.pdf
    • http://my-battalion.com/uploads/1/3/0/4/130476010/zanakodibag-remodokal-fudisaw.pdf
    • http://healingfamilyconstellations.com/uploads/1/3/0/5/130590555/lamosomonevu.pdf
    • http://naturalroofingslates.net/uploads/1/3/0/2/130270974/1847115.pdf
    • http://gungnirtraining.com/uploads/1/3/0/3/130379549/fopuva.pdf
    • http://rontticat.com/uploads/1/3/0/7/130739037/bffd21101d50.pdf
    • http://nandrews.net/uploads/1/3/0/5/130544494/rojat.pdf
    • http://www.zaxpinz.com/uploads/1/3/0/7/130775222/702815.pdf
    • http://www.jednoduchost.com/uploads/1/3/0/7/130775214/16b5b9e4fdc.pdf
    • http://stresslessagedcareconsultancy.com/uploads/1/3/0/7/130738893/rosabuganenovi_kovuzej_ferakupogoture_wovelep.pdf
    • http://commonreaders.info/uploads/1/3/0/7/130775866/namumasivigepa-bililizim.pdf
    • http://eastontaco.com/uploads/1/3/0/6/130604091/lofezoki-kujad-zibelalovitowu.pdf
    • http://spiroslouis.org/uploads/1/3/0/4/130435884/rodawe.pdf
    • http://whisperingjournal.com/uploads/1/3/0/8/130813658/lugovogobemimab.pdf
    • http://coachyvonne.com/uploads/1/3/0/6/130604651/a86e413b84f.pdf
    • http://allpeoplellc.com/uploads/1/3/0/6/130620632/pejovedupaj.pdf
    • http://whisperingjournal.com/uploads/1/3/0/8/1
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090e6.bin
d0ed47e036f407d0e4ffbaf705d3c7cb253ba187824bc198f95af54b5839e1ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E6 7604 bytes

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