PDF malware analysis — malicious · e129c83944ef2f78

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 21:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 2deaddde7510a17ccc2eb5e78541bec7 SHA-1: 47981687ed1bd76dcd60b13fc3a97e9d6fbb2d3a SHA-256: e129c83944ef2f785007ce8d5f985b264d1fedb1f7eef15a9c62350120aa6ea1

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as containing a link farm and was detected as a phishing trojan by ClamAV. The document contains numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection indicate a likely phishing or malware distribution attempt, possibly leveraging embedded JavaScript for redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://gimoguvi.ru/123?utm_term=call+center+quality+assurance+training+pdf PDF link annotation
- https://cdn.sqhk.co/motuwezelu/f7jc8GV/31530576764.pdfIn PDF document text
- https://cdn.sqhk.co/xivovido/c4hdMjb/pepegedixuwutikigu.pdfIn PDF document text
- https://cdn.sqhk.co/sugefixa/nd1pihg/5091648917.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501045/normal_603074d060606.pdfIn PDF document text
- https://cdn.sqhk.co/duzemata/cW7idja/billie_eilish_agent.pdfIn PDF document text
- https://cdn.sqhk.co/dagidomu/jdgg9Bz/61127519904.pdfIn PDF document text
- https://cdn.sqhk.co/dajusonas/siUihja/trailer_propane_tank.pdfIn PDF document text
- https://cdn.sqhk.co/tobepeliv/ibShjhN/fapufetatapofawufap.pdfIn PDF document text
- https://cdn.sqhk.co/wobimore/eIQhhia/19225771882.pdfIn PDF document text
- https://cdn.sqhk.co/wefopijupe/igoghfX/juwifote.pdfIn PDF document text
- https://cdn.sqhk.co/fusunusol/gfv1hSt/platformer_games_online.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445736/normal_6006c5d9a1fca.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
- https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_222be30e325f479aa3d56f13ce13e029.pdf?index=trueIn PDF document text
- https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_7d79ab161b254241bb5d85e89e72709c.pdf?index=trueIn PDF document text
- https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_7a738ca4d5ca4649884621b2413a4711.pdf?index=trueIn PDF document text
- http://vosimamasi.epizy.com/proper_squat_form_t_nation.pdfIn PDF document text
- http://vezuxasewarunun.epizy.com/abirami_anthathi_in_tamil_free_download.pdfIn PDF document text
- https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_38575fa8ffc547099b5c54f16fb7b8b7.pdf?index=trueIn PDF document text
- https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_0afc430187bd4ff1a024101955b95414.pdf?index=trueIn 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_off0000e6b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6B6	5344 bytes
SHA-256: `d5c3552c27a7d15de6105e6b7f235e7ed2859f7dff574b2bb0103cb2326270d4`
`font_01_sfnt_off0000f8f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8F0	10276 bytes
SHA-256: `93664d2052d4cc038254ea4b5bdc35bce8f01e7d40f00df0f17d926d8449e5d2`
`font_02_sfnt_off00011bd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BD3	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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