PDF malware analysis — malicious · e5e5ffedb2bdee8e

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 23:24:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 15db0148373766ef84955384710e158c SHA-1: 2f006c1888ddb665965126dae27017a0ca434fff SHA-256: e5e5ffedb2bdee8e277bad432511ffbea7fc609edae3ebaf4dbe32ee6348257b

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious redirection scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=blockhaus+stuttgart+speisekarte+pdf PDF link annotation
- https://cdn.sqhk.co/supetudoti/7ekbjbS/undesirable_no_1_template.pdfIn PDF document text
- https://cdn.sqhk.co/sujubowip/fshgXy3/47442570099.pdfIn PDF document text
- https://cdn.sqhk.co/fixiwuwukufi/iaJgiLX/defuse_the_math_bomb_3d_apk.pdfIn PDF document text
- http://trujillostacoshop.com/the_blind_assassin_review_new_york_times1yt85.pdfIn PDF document text
- http://buyfastedcircle.xyz/11885413400ddfwu.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/bca6a622-11ef-49d7-b6f3-7e77f4ce8b96/jinunomiwibojuxa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ed24cbb-45e9-480f-ac41-5fb798935097/zalovovarigalowonapa.pdfIn PDF document text
- https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_4df53dc295a646bc906b109de45bff68.pdf?index=trueIn PDF document text
- https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_d711a6d4eda44584909619af5f999b8a.pdf?index=trueIn PDF document text
- https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_56c2f1ea887144769dd494711c31013d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/06ba1d4a-843e-4f0e-8830-ab5e3f5bd7ae/lororava.pdfIn PDF document text
- https://fdf0fb27-5181-4190-8e1a-80fb86d87eb1.filesusr.com/ugd/2410c9_4651b6c07273412a92876dc387af4d1b.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/9af57fa4-3a33-4b0b-a258-3b6cf35f5db3/how_to_set_a_timex_t235_alarm_clock_radio.pdfIn PDF document text
- https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_6a68ccf4a4ab4c8399ea93e853eea78c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/2cb2690b-3529-402a-8bcc-cfbf3eff55ed/in_small_things_forgotten.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69377f53-3097-4d09-9f81-f305e0fc072a/94867358421.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e37442c0-5070-4236-bac1-fb146c902313/92598188089.pdfIn PDF document text
- https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_388f5072c0bc4e9582ea624fefc5df26.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_off0000f927.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF927	5528 bytes
SHA-256: `463b7f05dd96dbb6073991a63c2db5e26775ac5c9a59b4b3bf0bd10db93036fa`
`font_01_sfnt_off00010bf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF4	12060 bytes
SHA-256: `e9917b97937d60546478e7b716f53593e5386dcf12d071a9f3e90474c2b13f54`

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