PDF malware analysis — malicious · 00626ba9d4a4f74e

MALICIOUS

PDF

64.5 KB Created: 2020-04-14 01:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: ac5589e05c70d001783917ad31667a4b SHA-1: 21d6e561740411f039e18394d2928be6d48aac3b SHA-256: 00626ba9d4a4f74e3212d14da0be833f938023a28a1541d7c5b0c1008473280e

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified as a link farm. The ML classifier strongly indicates maliciousness, and the presence of numerous URLs suggests a campaign to drive traffic to potentially malicious sites or for SEO manipulation. No scripts were extracted, and the document body was heavily obfuscated.

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://allskillsconstruction.com/uploads/1/3/0/5/130551401/130551401.html#ligamentum+teres+and+falciform+ligament
- http://godlikecombo.com/uploads/1/3/1/4/131408172/wukesuxin.pdf
- http://lelandlionsclub.com/uploads/1/3/0/5/130550697/giguwitoputid-nitupenekipafin-xumaxaro-pejilepulewipu.pdf
- http://therealbellinghambaptistchurch.com/uploads/1/3/0/5/130590295/zopabuji_nakuzizi.pdf
- http://ambienceflooringaustralia.com/uploads/1/3/0/2/130289185/ffad3.pdf
- http://newlenoxrealestateattorney.com/uploads/1/3/0/6/130620579/939d34b4a.pdf
- http://rafaelvaladez.com/uploads/1/3/0/4/130476766/dukap.pdf
- http://beakidandhavefun.com/uploads/1/3/0/5/130588214/viluguwar.pdf
- http://gogems.us/uploads/1/3/1/3/131383427/jabunalega.pdf
- http://stjohnofthecrossacademy.com/uploads/1/3/0/9/130969297/5b3ef.pdf
- http://j-z-chapo.com/uploads/1/3/0/5/130590689/38202.pdf
- http://arkasabienesraices.online/uploads/1/3/1/0/131070718/mukakudozi.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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/
- https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b468.bin` `49ab4131ce37ef5eeb77bf054c276e505f684e195c6b23e7d01a498db323f06b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB468	9120 bytes
`font_01_sfnt_off0000d6b5.bin` `e2a609504f31aba74360c8f97aead3d8f97c76e888a653261413c8bef59e3205`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6B5	2884 bytes
`font_02_sfnt_off0000e085.bin` `b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE085	16036 bytes

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