PDF malware analysis — malicious · 26d8fae226013aef

MALICIOUS

PDF

77.3 KB Created: 2021-05-31 08:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 2bf4d0aa6f73969a1c6a56ce4d573d87 SHA-1: a901734ac97fa7b42a0bb5d38b43a3b8fc0f89c5 SHA-256: 26d8fae226013aefcfdeb606f3f836a66c7b96edaa2a13fa7ce90eb97b825695

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://resalured.ru/123?utm_term=pro+and+anti+suffrage+arguments+worksheet+answers PDF link annotation
- https://kogozodibivuf.weebly.com/uploads/1/3/6/0/136094397/7393310.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423430/normal_606d4911aeb3d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448341/normal_605d8dcec9d73.pdfIn PDF document text
- https://lasemekesote.weebly.com/uploads/1/3/4/3/134314396/5966a85c193b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417208/normal_5fcc5f1537769.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366343/normal_5fc56f44e7ea1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388293/normal_5fe8f5af4acfe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500183/normal_5fca1937736d0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408863/normal_5fdf4862ef327.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454055/normal_5fdeac0197f61.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418574/normal_6054c7d7da7b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494668/normal_605c877f6a96d.pdfIn PDF document text
- https://vopozurizezeta.weebly.com/uploads/1/3/4/0/134012331/1178621.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469353/normal_6011aa2e35dc0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473384/normal_5ff901dc7c512.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457590/normal_606786b50bc63.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/6aaa7ecd-9eaa-4859-8403-25ceecc1e15b/11454939442.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e6c62ffc-3df0-4d42-9865-19962e3653f0/how_to_reset_my_netgear_router_to_factory_settings.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6ff88889-e0e0-4ea1-9904-88b4f9f489be/pearson_maths_class_8.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5fbb2843-21d4-4577-b2b9-de6e319f1c7e/how_to_set_the_ringtone_on_my_phone.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b0c200b-bbcc-4057-9046-28fdc9913ce6/tukolebulaxovojeb.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7b0856b8-6eb2-41be-aab1-d8120c623fe2/lavolesugokolor.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f8b7fc5f-89c7-4b46-ac51-e0f4663c18a7/gajijofekotaluzamesojaju.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e101bd71-f71e-469f-a355-c70b0176992b/acorde_gm_piano.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_off0000f070.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF070	5448 bytes
SHA-256: `e999337eacab9f21c391b3048d7791cd87c531eaf36f0d7b55b962dba7e8c94a`
`font_01_sfnt_off000102e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102E2	10712 bytes
SHA-256: `2ac0bc7ca479c4078fe8959278bbb1fb46217183bdcd134bee0c07f45cc0046f`

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