PDF malware analysis — malicious · 1edcf26b3b3cbbe9

MALICIOUS

PDF

76.5 KB Created: 2021-01-06 05:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 587952ab76ea3522ba98d59b0d2caada SHA-1: 7eab02b7adedf6055e775d1fa482a972850d77ed SHA-256: 1edcf26b3b3cbbe909471b37ef5f95e67e5cc40337c3ffce0c640e7a27abc9b8

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
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 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.
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://traffmen.ru/aws?utm_term=wrong+turn+4++480p In PDF document text
- https://cdn.sqhk.co/mujexoxa/ihQjahg/litagutebunaxelawu.pdfIn PDF document text
- https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/2073367.pdfIn PDF document text
- https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/pogufa-mukax.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378628/normal_5f98239a60163.pdfIn PDF document text
- https://cdn.sqhk.co/raxoxawupej/fMifjJf/barbecue_sauce_recipe_for_chicken.pdfIn PDF document text
- https://cdn.sqhk.co/bugolajoxodu/7ghiggd/stupid_zombies_3_for_pc.pdfIn PDF document text
- https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/kefupomakibiputojeza.pdfIn PDF document text
- https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/lolatuzitek-bejakitumobi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417327/normal_5fc9fba594670.pdfIn PDF document text
- https://joluduloj.weebly.com/uploads/1/3/4/2/134266967/muzoxuwimi.pdfIn PDF document text
- https://segapokepex.weebly.com/uploads/1/3/4/6/134649200/falar_fafevazuwimaxo_xulebukinetom_depekivuduv.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://uploads.strikinglycdn.com/files/32019673-ef4c-46da-958c-255cf21b0274/zuxefifu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/40d32fc0-7921-43d5-aef1-156414caf441/navajo_loom_plans.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF4D	6744 bytes
SHA-256: `0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63`
`font_01_sfnt_off0000e034.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE034	5004 bytes
SHA-256: `4fd4f35b8b8397320e49f43630583f6019b264c50257ea882be560e40e40a19d`
`font_02_sfnt_off0000f168.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF168	10968 bytes
SHA-256: `74ea780c2c22d2669b77aa2a6a80592abd894b345b8e5efbbe6a7e784a13c80a`
`font_03_sfnt_off000116c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116C3	3440 bytes
SHA-256: `96871b0eccc574b6cc21898d7d7a6a21efba054317edf8943c8bda3e89e2a92d`

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