PDF malware analysis — malicious · 032fd46d3908f62b

MALICIOUS

PDF

88.3 KB Created: 2021-07-10 09:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 5ea07b254d4b6af92baa272c81beb8ac SHA-1: 886e5f07085f83587c6d320384d418730f62ecf9 SHA-256: 032fd46d3908f62b3342b115ce0cc12a423fc45e943a6b64b2d36fc9b9d6ca9c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous websites hosted on compromised WordPress installations and disposable domains. The embedded URLs, such as 'https://irlanc.ru/uplcv?utm_term=holy+jb+mp3+download', likely serve as lures for phishing or to download further malicious content. No scripts were extracted, but the overall structure suggests an attempt to exploit user trust through deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://irlanc.ru/uplcv?utm_term=holy+jb+mp3+download PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b0f08a910---midolotizidutasore.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c930c381d17---81048606460.pdfIn PDF document text
- http://consulcongress.it/uploads/assets/file/42460104011.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6vf8dh5p27cavnjukq6ves5hdg/72254455493.pdfIn PDF document text
- https://eatorhours.org/e-bussiness/fckimages/file/fupiverupuzef.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/23318498903.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9c31f13015ecb7fa7af646fb63ea5558/57946036897.pdfIn PDF document text
- http://atut-biuro.com/uploaded/file/doxudugefaboxaxamowufa.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36bbe21717---galulato.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e59625fe2---bifanelapenof.pdfIn PDF document text
- http://clinical-pain.com/pds/userfiles/files/zakolatijeluwenex.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c5d62dba14dbb77e090da54150db3dee/15952419334.pdfIn PDF document text
- https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/8967cf2f90c028641a30654dc722a175/35460165418.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/d77fe9022aae8122a71e0add611ea378/bikixez.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/6714d6bf37cbbf36040eeb2134046df8/41845078418.pdfIn PDF document text
- https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/8bf58541fb8609df4beeb6d29ab51f86/745632871.pdfIn PDF document text
- https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/d341b4abaa0b36cd49395a45a027cf69/77147223477.pdfIn PDF document text
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f4f0335ccf452b44b2e6d1c6a3e71b88/47932643904.pdfIn PDF document text
- http://przychodnia-felinskiego.pl/uploads/editor/file/limediz.pdfIn PDF document text
- https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/7c632cff76b7942290227e99884f4158/71134656867.pdfIn PDF document text
- http://citescolairedeledit.com/include/file/demogakilajakaz.pdfIn PDF document text
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac814a3c04c---wevurupebed.pdfIn PDF document text
- https://themis-lex.com/userfiles/files/48257562806.pdfIn PDF document text
- http://koryosushi.com/uploads/files/xowabemuguzixosexuf.pdfIn PDF document text
- http://canvangdientu.com/images/file/fawitofodeneraboxubi.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee462db6e---88355629040.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f3b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3B1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010bc8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BC8	10596 bytes
SHA-256: `6fffda30d6493ed60c26d879fb09881f53edd25c29362f04ed1cf20ce91b8ca5`
`font_02_sfnt_off000123be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123BE	19088 bytes
SHA-256: `2a1d51ec34b024dbc31201f78c54ca36d65277e6d8e0f425c5b82c4eeb2bdcea`

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