PDF malware analysis — malicious · 267efb60149bfbdd

MALICIOUS

PDF

52.6 KB Created: 2020-05-23 06:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cc0abb55b9a25f081b09da47e4125f97 SHA-1: 5680f1bb3d1f04e23bf524ad8becad6d7a3987d8 SHA-256: 267efb60149bfbdd6e5dfc4db4b287c477d7b3210c39fd21050df135293d66db

94 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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with a link farm or SEO spamming operation, potentially used to distribute further malicious content or manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://georgeleads.com/uploads/1/3/0/3/130379429/130379429.html#ap+chemistry+electrochemistry+free+r
- http://colleenchristmanmusic.com/uploads/1/3/1/8/131856158/dofimem.pdf
- http://livingnightmarestv.com/uploads/1/3/0/7/130776405/1788769.pdf
- http://localhippy.com/uploads/1/3/0/6/130604379/6802658.pdf
- http://pharrproducelogistics.com/uploads/1/3/0/9/130969432/zoribemepor_baviwuzuze.pdf
- http://billinco.net/uploads/1/3/0/8/130813094/33c6654ce6.pdf
- http://moneytipmonday.com/uploads/1/3/0/6/130604241/ab0f6bb.pdf
- http://sassyliterarydiva.com/uploads/1/3/0/7/130775668/tobikubavawajid.pdf
- http://una-blogger.com/uploads/1/3/0/9/130969254/e8fda5.pdf
- http://truedatausa.com/uploads/1/3/0/9/130969162/1b0db69f0f19af.pdf
- http://anistazi.com/uploads/1/3/0/7/130776122/rudiximedoto.pdf
- http://teresacrowder.com/uploads/1/3/0/7/130739240/domobutusaxamon.pdf
- http://schneider-sicherheitstechnik.com/uploads/1/3/0/6/130640132/povikoxajoxin.pdf
- http://alanajanebrows.com/uploads/1/3/0/8/130873958/sojal-mivuga.pdf
- http://boysandgirlsdl.org/uploads/1/3/0/4/130488565/a4d56.pdf
- http://ompeacelove.com/uploads/1/3/0/4/130476539/5638764fd275b5c.pdf
- http://gbonomo.com/uploads/1/3/1/4/131407492/misaxula.pdf
- http://downhomepoems.com/uploads/1/3/0/9/130969355/3025372.pdf
- http://waybackmachineco.com/uploads/1/3/0/2/130270775/kavibiwuvedikap.pdf
- http://saintcatherineithaca.org/uploads/1/3/0/7/130776692/23b9066.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00009ec4.bin` `211ea7d3adf7c42ac78745df1fe692678d132ea70adab655c1888a762cc50c6d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EC4	11724 bytes

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