Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3d65f182b10cb3…

MALICIOUS

PDF

47.6 KB Created: 2020-03-13 05:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0089ff35339bf1af8c00431a885137a SHA-1: 3b412d16e0e3b1a033b170e5605ac35a9220c0a0 SHA-256: fe3d65f182b10cb3225a2077c390ccee160edeb2214220026f2ceeb9dc39c0be
96 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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to numerous PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

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://marconettzoo.com/uploads/1/3/0/3/130379485/130379485.html#d
    • http://www.brownsarchitecturalantiques.co.uk/uploads/1/3/0/2/130287965/zipuxal-sadusodasewi-zazilota.pdf
    • http://reformedvoluntaryist.com/uploads/1/3/0/5/130539414/584f69415f2.pdf
    • http://a.marisths.org/uploads/1/3/0/6/130640105/lupigiguxoj.pdf
    • http://wheregodisatwork.com/uploads/1/3/0/3/130323120/0f61083b95.pdf
    • http://pitwaterproofing.net/uploads/1/3/0/4/130476229/5071000.pdf
    • http://facialplasticsurgery.gripe/uploads/1/3/0/4/130476672/4560682.pdf
    • http://growtolearnnyc.org/uploads/1/3/0/7/130775935/6e2292533f.pdf
    • http://investorsbook.com/uploads/1/3/0/7/130740568/9889038.pdf
    • http://fysiomelanen.com/uploads/1/3/0/4/130483903/wotunefozunegak.pdf
    • http://mysecurit.com/uploads/1/3/0/6/130604495/bagunadebikajek.pdf
    • http://toosrodieck.com/uploads/1/3/0/4/130436147/6544459.pdf
    • http://picassowhat.com/uploads/1/3/0/5/130588277/kewujefatabaku-tanawewo-gekafoxufuduzud-zumivadaj.pdf
    • http://orlandohauntedhouse.net/uploads/1/3/0/6/130621946/rinesusos.pdf
    • http://nohur.com/uploads/1/3/0/6/130621882/39fce46e69.pdf
    • http://sidtandkendrasaunders.com/uploads/1/3/0/2/130288559/5ee79aa5a745a.pdf
    • http://joinplatinumteam.com/uploads/1/3/0/6/130621687/luliwevura_riputaxoreze.pdf
    • http://www.mcatgent.org/uploads/1/3/0/4/130488476/levoberaxu_kudokobuwefof_wulijirumukili_jopuj.pdf
    • http://mizzenmanagement.com/uploads/1/3/0/5/130588343/2966e3.pdf
    • http://edibleweed.store/uploads/1/3/0/2/130289669/5334550.pdf
    • http://www.dev.poliglow-int.com/uploads/1/3/0/7/130739538/7406435.pdf
    • http://independencebible.com/uploads/1/3/0/8/130874133/rapaneged.pdf
    • http://betterspacesllc.com/uploads/1/3/0/7/130740068/4c35c.pdf
    • http://mail.transtenskolan.se/uploads/1/3/0/2/130289266/0c1653d4bd96.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d3.bin
2a74ea77d9899875d19231199a22fd5fb66c631399e340f36cd1fcbbef25b03e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 9832 bytes
font_01_sfnt_off00009bfb.bin
df5efbd9f539e0d3dc767554fbaab5991a9d69fd3343e08a3c9d199245486688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFB 16064 bytes

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