Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee15573e1cdd01e…

MALICIOUS

PDF

34.9 KB Created: 2020-04-10 07:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf668786b5602e5c5fd28ccc4497f51e SHA-1: e795d2c32eaac8c78d0ecac0cd1f96722ac7efa0 SHA-256: bee15573e1cdd01ed61bb2940e2b2baea84f06606ffaa03fb3f6b7c15c9496d2
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which appear to be generated for SEO purposes, indicating a link farm or spamming operation. The embedded content, though partially corrupted, includes URLs that suggest a lure related to appliance repair or technical assistance. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to direct users to potentially harmful external sites.

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://mayasink.com/uploads/1/3/0/3/130313605/130313605.html#manually+unlock+kenmore+elite+washer
    • http://2freshny.com/uploads/1/3/1/4/131482833/wolosagoj-zumif-bufotexipaw.pdf
    • http://thephesantgreatchishill.com/uploads/1/3/0/9/130969332/db4ba9edcab37.pdf
    • http://ukcitizenshipbyinvestment.com/uploads/1/3/0/4/130435870/jobuvuvegivebaf_wupivafujirinur.pdf
    • http://yuchapakart.com/uploads/1/3/0/8/130874318/7277391.pdf
    • http://lemondeetmoi.fr/uploads/1/3/0/2/130270859/tojusa-velogem.pdf
    • http://cuppingportland.com/uploads/1/3/0/5/130551378/zedapukonubeg.pdf
    • http://gaualauf.com/uploads/1/3/0/2/130288406/morigeravitit-xasesovezaravut-siwemitofojoda.pdf
    • http://effloraison.fr/uploads/1/3/1/4/131483153/nanoxak.pdf
    • http://glimpzuk.com/uploads/1/3/0/5/130588701/ruruzigixi-xapedemuzitoso-verid.pdf
    • 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_off0000617b.bin
c4742a42c6a48a354d0d443bcecc6358c1ce321b55a4e957b72677d0192c7449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 7520 bytes

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