PDF malware analysis — malicious · 28107eadc0e486ed

MALICIOUS

PDF

71.0 KB Created: 2020-06-04 22:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1bbd8b677adb3c7e0e0f6b982effc145 SHA-1: 249aac215bfbedd50cbca50fb6a60b2011046be3 SHA-256: 28107eadc0e486edf9b1a08a24813140d5ce352d38605541506c09e0792b0f6c

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a common technique for SEO spam and phishing. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://mysmartflower.com/uploads/1/3/1/8/131872289/131872289.html#los+protocolos+de+sion+descargar
- http://completeeats419.com/uploads/1/3/1/4/131406831/a68281c4b73.pdf
- http://taraden.net/uploads/1/3/1/4/131437532/3e88e8579bdc.pdf
- http://tacaccountants.com/uploads/1/3/0/2/130272481/xivusavipanuworexe.pdf
- http://bernellsbaking.com/uploads/1/3/0/6/130639343/jawerepomaleterofoma.pdf
- http://minnesotaturfpros.com/uploads/1/3/0/8/130873978/8239622.pdf
- http://thejjdardangroupinc.org/uploads/1/3/0/3/130313075/9985212.pdf
- http://burlsandblades.com/uploads/1/3/0/5/130588319/8983198.pdf
- http://esarnkheaw.co.uk/uploads/1/3/1/3/131398459/xotexelesi.pdf
- http://anbilliamlatelier.quebec/uploads/1/3/1/8/131857914/22aacd1.pdf
- http://jacuzzivasar.com/uploads/1/3/0/7/130774962/983586332ba5.pdf
- http://thatanimalgroup.org/uploads/1/3/0/7/130775527/8179090.pdf
- http://amawrappingworks.com/uploads/1/3/0/5/130540554/mixet.pdf
- http://returningtocompassion.com/uploads/1/3/1/1/131164293/7da897e99.pdf
- http://mysmartflower.com/uploads/1/3/1/8/131872289/terms.html
- http://mysmartflower.com/uploads/1/3/1/8/131872289/dmca.html
- http://mysmartflower.com/uploads/1/3/1/8/131872289/policy.html
- https://magelibagub.files.wordpress.com/2020/06/wenuvol.pdf
- https://biwijemafag333112286.files.wordpress.com/2020/06/73966853755.pdf
- https://fowomavopil899143489.files.wordpress.com/2020/06/dadumedeg.pdf
- https://wakogokanexu.files.wordpress.com/2020/06/51760315264.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_off0000e423.bin` `f5f47cd2208050a45db877b27fc25fafdb113e237080277eb0cef1f7b9aec76a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE423	13256 bytes

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