Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8549f114abaddd…

MALICIOUS

PDF

45.1 KB Created: 2020-03-28 02:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b424c62db551c878be7478931ba85f88 SHA-1: 3e3d2790bc357d01a7e8eb78af617ffa041c891c SHA-256: 4e8549f114abaddde755dac5a7044755f40be8ff58095ce4d3f63e503942e63e
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic. The document body also contains a link to "descargar proteus 7 portable gratis", suggesting a lure to download software. The numerous external PDF links likely serve to distribute malicious content or manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baylandesign.net/uploads/1/3/0/4/130489038/130489038.html#descargar+proteus+7+portable+gratis PDF link annotation
    • http://petersonskattum.com/uploads/1/3/0/2/130289242/1063997.pdfIn PDF document text
    • http://countingwithelliot.com/uploads/1/3/0/6/130639240/wurakukimutoje.pdfIn PDF document text
    • http://www.ramsaymusic.com/uploads/1/3/0/2/130287845/positivife-xovozurufeten.pdfIn PDF document text
    • http://neworleans-homeinspections.com/uploads/1/3/0/3/130379074/wusojute.pdfIn PDF document text
    • http://arbucklelakelodge.com/uploads/1/3/0/7/130775205/3515009.pdfIn PDF document text
    • http://candrtitle.com/uploads/1/3/0/8/130874123/nerirotaz.pdfIn PDF document text
    • http://www.calmingcareconnectionsllc.com/uploads/1/3/0/2/130289352/posivexuze.pdfIn PDF document text
    • http://74-123-77-238.mgwnet.com/uploads/1/3/0/4/130488248/1544892.pdfIn PDF document text
    • http://advisorcpr.com/uploads/1/3/0/8/130873828/gagagigewape_wipowugizi_savuwow.pdfIn PDF document text
    • http://nwavalanchesolutions.com/uploads/1/3/0/6/130621213/5595119.pdfIn PDF document text
    • http://darwinlazatinphotography.com/uploads/1/3/0/7/130775830/3937844.pdfIn PDF document text
    • http://liderazgodocente.com/uploads/1/3/0/2/130287314/lidibelewototi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000068b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 8456 bytes
SHA-256: ab05af95b540ec91f5390e4ea72e25c41a5ef35e4fc3e231b19b07a45a8c1ebf
font_01_sfnt_off00008803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8803 2000 bytes
SHA-256: a1600c79331cba21b3b4a1f056a9d989f02b1280d9db796053b5096bff0b23f3
font_02_sfnt_off00009170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9170 16080 bytes
SHA-256: c45ecc3521217a1dc016c14e045d78f78e0d194bf1e1893e402d944f9961a49f

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