PDF malware analysis — malicious · d0f06b2035c7bcab

MALICIOUS

PDF

44.1 KB Created: 2020-03-30 02:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 1fe832010e17aa7b476d7e3b0f02cf65 SHA-1: be70067c45e65f09672f4e166feab3d0e47c7c28 SHA-256: d0f06b2035c7bcab2b85d75982b2b797172e7faaeb43abf2f5f636fe0b1d47e6

94 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 by the PDF_SEO_LINK_FARM heuristic, which is indicative of a link farm or SEO poisoning attack. The document body, though partially corrupted, contains a lure related to resetting a dishwasher, directing users to a URL that is part of this link farm. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://cpanel.ladse.org/uploads/1/3/1/0/131069978/131069978.html#how+to+reset+whirlpool+quiet+partner+1+dishwasher
- http://blackdogcottagepublishing.com/uploads/1/3/0/8/130813790/1874636.pdf
- http://1682washington.com/uploads/1/3/0/4/130489070/wurajofim_tamutekatosanab_wogija.pdf
- http://cooriedoonbaby.com/uploads/1/3/0/7/130739517/nuwinufazogulub.pdf
- http://zenyasastudio.com/uploads/1/3/0/9/130969990/65e88.pdf
- http://cordillerastonedepot.com/uploads/1/3/0/4/130491513/5347403.pdf
- http://originalsbylechelle.com/uploads/1/3/0/4/130476468/tokowisaxebiwokawus.pdf
- http://canfieldhillfarm.com/uploads/1/3/0/9/130969628/vigerowo.pdf
- http://oxfordnaa.com/uploads/1/3/0/6/130622103/dozifar-vopukatizur-xapidazejepober.pdf
- http://bdeadvisors.com/uploads/1/3/1/1/131163514/1665455.pdf
- http://canfieldhillfarm.com/uploads/1/3/0/8/130874053/3ad827cd6b6ec.pdf
- http://pinehill-in-the-catskills.com/uploads/1/3/0/5/130589168/balinusijopu.pdf
- http://baprints.net/uploads/1/3/0/4/130435721/resilo-lanumi.pdf
- http://virginiabyrdart.com/uploads/1/3/0/6/130639373/kigaso-pasimamupemugep.pdf
- http://noquest.net/uploads/1/3/0/6/130640126/fetisa.pdf
- http://mosholudaycamp.com/uploads/1/3/0/5/130538959/4856531.pdf
- http://fireselkiecreations.com/uploads/1/3/0/3/130379167/tuxab_pesesig.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006ef6.bin` `5d2e0c85f292d29816a844ff380d48c05c05da59247e2a3a216f0e3a7010ebcd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EF6	7956 bytes
`font_01_sfnt_off00008dea.bin` `779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DEA	16036 bytes

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