Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95d32e3bf3291c2…

MALICIOUS

PDF

50.8 KB Created: 2020-05-31 17:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 4a5c9a2dedae1a3432ba3116b599f08a SHA-1: 6564e204334241531444d65119303efaa9617933 SHA-256: e95d32e3bf3291c2b3352762c600314343eab903a0b0c22fedecdbc0779e965c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, a technique often used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, pointing to a dominant host '74-123-72-55.mgwnet.com' and numerous other linked PDFs. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact payload. However, the sheer volume of external links suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rethinkorganics.ca/uploads/1/3/0/9/130969774/130969774.html#past+simple+regular+verbs+ppt PDF link annotation
    • http://74-123-72-55.mgwnet.com/uploads/1/3/0/2/130288421/0ff39bb.pdfIn PDF document text
    • http://whagoingon.com/uploads/1/3/1/6/131636665/3095500.pdfIn PDF document text
    • http://taylomack.com/uploads/1/3/0/7/130776790/94a2d4d5b4.pdfIn PDF document text
    • http://changetravels.de/uploads/1/3/0/6/130605306/xireg.pdfIn PDF document text
    • http://freinokorhostel.com/uploads/1/3/0/6/130605165/xobagatidofavak.pdfIn PDF document text
    • http://utahsixmonthbraces.com/uploads/1/3/1/4/131453896/xizovisa-wositaw.pdfIn PDF document text
    • http://washingtongrizzlieswrestlingclub.com/uploads/1/3/2/3/132303396/xotafewitizu.pdfIn PDF document text
    • http://flashtheleather.com/uploads/1/3/1/3/131383657/sumujiperixow-durulatife-ripiguv-kiwidoxa.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gokidomaj.files.wordpress.com/2020/05/98041730844.pdfIn PDF document text
    • https://tivujoz.files.wordpress.com/2020/05/27098400728.pdfIn PDF document text
    • https://fupalowonega.files.wordpress.com/2020/05/fapuzelexowa.pdfIn PDF document text
    • https://kipevofi.files.wordpress.com/2020/05/tobafukonitefixasavope.pdfIn PDF document text
    • https://jidinetobix.files.wordpress.com/2020/05/vigepupukuwudorudirelut.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00006f9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6F9E 16472 bytes
SHA-256: ed14a276ef100ba3bc56bce2cfd6114f00de00d00085808baaf7b4d6c2a3a541
font_01_sfnt_off00009d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0B 9176 bytes
SHA-256: 4a6573602e06ba4c858176bab60026920611b5223eda382a4abe7999f2989517

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