PDF malware analysis — malicious · 7f7bfaa4ba84eebb

MALICIOUS

PDF

77.3 KB Created: 2021-05-10 22:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: b375193971452da55527723df17d89bc SHA-1: ce7f6c957e731d1a03790b52734ac749a33b1eae SHA-256: 7f7bfaa4ba84eebb202499e8860d6d3d75e68eda956a4bded877d89e5d21a887

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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 https://nipisod.ru/strik?utm_term=why+is+my+garbage+disposal+leaking+under+the+sink PDF link annotation
- http://qwonder.space/devijeguwokagejenesvzdk.pdfIn PDF document text
- https://jojapunopumaj.weebly.com/uploads/1/3/1/4/131482926/3046816.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453540/normal_5ff084ddb4fe5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423454/normal_6058e1b35f8f0.pdfIn PDF document text
- http://microbladingeyebrowsdallastx.com/sarolesanusejidanazosi4wv1w.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474446/normal_605351deb33df.pdfIn PDF document text
- https://rufawakifored.weebly.com/uploads/1/3/1/8/131856207/nadapovujurirasola.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420766/normal_5ff800abc1f2f.pdfIn PDF document text
- https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/nokevamebijezukujija.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490123/normal_60468bd6ca90e.pdfIn PDF document text
- http://sentytld.online/how_to_clean_peg_perego_prima_pappaww3jq.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484355/normal_5ffcddec34c7c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376088/normal_603523cfa30a9.pdfIn PDF document text
- https://cdn.sqhk.co/derubejes/tr2gjz1/when_did_football_get_called_soccer.pdfIn PDF document text
- https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/7814662.pdfIn PDF document text
- https://cdn.sqhk.co/marixefe/DnhijgD/71365137612.pdfIn PDF document text
- http://videohost.space/79628571582equ0u.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4492278/normal_5ff709b77f121.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469631/normal_6054396d65407.pdfIn PDF document text
- https://cdn.sqhk.co/jawosuzexe/jfyrAhj/30_seconds_to_mars_band_logo.pdfIn PDF document text
- https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/4736005.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449771/normal_6025ee777fdc5.pdfIn PDF document text
- http://beach-fruit.fun/toxinawokujsg.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/kozewuposoridil/69794754755.pdfIn PDF document text
- https://s3.amazonaws.com/wiwamoxamo/reznor_heater_parts_fan.pdfIn PDF document text
- https://s3.amazonaws.com/tejuvonixag/bca_digital_electronics_questions_and_answers.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF7C	5692 bytes
SHA-256: `afec287167d9cd1d31b8af613442f12dac1727edb44bfdaeb1a0c0de502efba3`
`font_01_sfnt_off000102ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102BA	10604 bytes
SHA-256: `c9a3e986f35bc727a4e68ceafef9fde4d73d1f9ae3a3f709f3410a56f02b03c1`

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