PDF malware analysis — malicious · f9105dc202b3efb0

MALICIOUS

PDF

79.2 KB Created: 2021-06-11 12:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 333d32d3e1b38704696904bb29eef7a8 SHA-1: a881697a4572ec5387c6f881190fc9f443111c8e SHA-256: f9105dc202b3efb0894a17cb671e30b78c268c6832fc9776ba8f8642b553dd55

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to 'auto clicker ios free', likely a lure to direct users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

Heuristics 6

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 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.
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://wastran.ru/pbw?utm_term=auto+clicker+ios+free PDF link annotation
- https://vuwodasoruza.weebly.com/uploads/1/3/4/4/134436366/kosix.pdfIn PDF document text
- https://xeravatiwawu.weebly.com/uploads/1/3/4/6/134603636/venaxeje.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409623/normal_6017aba6dd14f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478946/normal_60104b59a07d4.pdfIn PDF document text
- https://wigikeketiru.weebly.com/uploads/1/3/1/4/131406435/sarogog_duzuvuwoluwelo_sebawapu_tewetes.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411918/normal_5fc611c020809.pdfIn PDF document text
- https://lidawoxijotixi.weebly.com/uploads/1/3/4/6/134659122/mopibufasowopukis.pdfIn PDF document text
- https://betagoguf.weebly.com/uploads/1/3/4/6/134668965/4710639e331776.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495988/normal_601dbd1d8d1f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379371/normal_6054480c8b323.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501794/normal_606c76df17b7b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444850/normal_60355f22d170f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484097/normal_5fd82a2bee17c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424953/normal_5fdc6ad02ddc0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415951/normal_60315bff9035f.pdfIn PDF document text
- https://wijaxogelawatu.weebly.com/uploads/1/3/4/6/134622036/xilejaz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412606/normal_6019f4edf2bbc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387699/normal_605e1c9e748d5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413703/normal_6001d7eeec0fb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405202/normal_5ff21a929456c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418993/normal_60111d96cbe5c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408588/normal_5ffa278f7bcee.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413712/normal_5fe392ac317d8.pdfIn PDF document text
- https://sububavujowiv.weebly.com/uploads/1/3/4/4/134460245/kowigok-xiber-vutoxatis-witodituvirek.pdfIn PDF document text
- https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/fijesetura_jilogerabewur_nokepijogigapi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448323/normal_606e2f1b66beb.pdfIn PDF document text
- https://zijisejimalunu.weebly.com/uploads/1/3/4/4/134495917/601164.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374956/normal_5fe2ade8ef10f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ed65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED65	4496 bytes
SHA-256: `54f8446c501229e7c56d2ad2550149c77184b023c0e43d9402a514f1ed0ab066`
`font_01_sfnt_off0000fcc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCC1	10668 bytes
SHA-256: `cc1138af5f7d9a056e4fb8c019b2948cc7b358e9a8fb1a038181014c56ee2cff`
`font_02_sfnt_off0001211d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1211D	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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