PDF malware analysis — malicious · 17e6aaa6efd57dd5

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 03:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 66c33e09ecbfe1b5f02b184ecb365c62 SHA-1: 26e06bc0a936635e235731e151454f89551bac3d SHA-256: 17e6aaa6efd57dd57f09381d980538549f346ff46ca64c30521a8d55c954d019

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, one of which, 'https://dafemum.ru/strik?utm_term=how+to+manifest+someone+specific+to+love+you', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to manifesting love, likely to entice users to click the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://dafemum.ru/strik?utm_term=how+to+manifest+someone+specific+to+love+you In PDF document text
- https://cdn-cms.f-static.net/uploads/4408996/normal_603a7caf0ff88.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391327/normal_605ad8fc63887.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381539/normal_5fd64e343ae18.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449781/normal_6018ee2c63461.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470553/normal_5feaf383b54c3.pdfIn PDF document text
- http://fiduwil.iblogger.org/callan_method_vk.pdfIn PDF document text
- http://shop50off.info/berger_easy_clean_shade_card05px5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373983/normal_60288dc28b7d6.pdfIn PDF document text
- http://giveaway2020.info/xemajalenogoleliwqzcb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385647/normal_602308811ec37.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_b4d2a9dd7ee84bd9a8a6ade080d58f86.pdf?index=trueIn PDF document text
- https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_7fae835d44f340008af675e55bbcacae.pdf?index=trueIn PDF document text
- http://torogita.rf.gd/synonym_for_good_spreadsheet.pdfIn PDF document text
- https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_2d18626ad8bd4f12905a8f6d90276959.pdf?index=trueIn PDF document text
- https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_8c25aa0d199d4c67a303a8cdfc4ad13e.pdf?index=trueIn PDF document text
- https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_0025f1b119db446d8665fcba478dbf70.pdf?index=trueIn PDF document text
- https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_53629f56f9434a739d87b3f29f1bbb6c.pdf?index=trueIn PDF document text
- https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_0a9e73ea665f461f8a021c7265bf3af1.pdf?index=trueIn PDF document text
- http://rufuregebedus.rf.gd/72847334426.pdfIn PDF document text
- https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_02fe28e5d92d45538439fb679ae8e659.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f608.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF608	5280 bytes
SHA-256: `9288a645c2b4514d6176a44bb6b6244a9c3b38e8a3f31afb54419b1d8c8ea14e`
`font_01_sfnt_off0001080d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1080D	10512 bytes
SHA-256: `8271386a9d018ca271cdcb51e2ae853cf7db434b1d550583d70cdc3a297ceb58`

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