PDF malware analysis — malicious · 436e3b49f8dd961e

MALICIOUS

PDF

77.5 KB Created: 2021-03-04 04:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 8e312818b5715132397474c928b4b26f SHA-1: dda5ff46c2ededbef8962542a0b8979f710f786c SHA-256: 436e3b49f8dd961e78a99a9459b5ffc5ee1257c0c59934ecb438dd5435987939

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed to lure users to other sites.

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://dugedepap.ru/award?keyword=sharp+air+conditioner+parts+australia PDF link annotation
- https://cdn.sqhk.co/wogefosa/VicTihk/jio_recharge_validity_check_number.pdfIn PDF document text
- https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/bifok.pdfIn PDF document text
- https://zagibekopawof.weebly.com/uploads/1/3/1/4/131453283/7106628.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402721/normal_5fd7c245f28c0.pdfIn PDF document text
- https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/4fb975d9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445541/normal_5ff302107bc7a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384164/normal_5ff8b67a89dd4.pdfIn PDF document text
- https://sizofepetawun.weebly.com/uploads/1/3/6/0/136087679/nefoneratemoda.pdfIn PDF document text
- https://bogizironafek.weebly.com/uploads/1/3/1/4/131406395/81ed1b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490529/normal_6025e4096ad51.pdfIn PDF document text
- https://logazimakopaw.weebly.com/uploads/1/3/4/3/134399250/7492ae5.pdfIn PDF document text
- https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/804691.pdfIn PDF document text
- https://divowugu.weebly.com/uploads/1/3/6/0/136022164/jedozukagiwaligejuf.pdfIn PDF document text
- https://cdn.sqhk.co/revinoxu/hDecMgd/temple_run_2_game_on_poki.pdfIn PDF document text
- https://pigixona.weebly.com/uploads/1/3/5/9/135986477/datofaganixefuv_filare_wopigo.pdfIn PDF document text
- http://davupopebuwiser.sportsontheweb.net/toro_s200_snowblower_carburetor_kit.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://s3.amazonaws.com/kosipefojaw/android_auto_new_ui_not_working.pdfIn PDF document text
- https://s3.amazonaws.com/paropabaru/how_to_write_a_reaction_paper_example_tagalog.pdfIn PDF document text
- https://s3.amazonaws.com/vukumesoj/99117523451.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e585.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE585	5144 bytes
SHA-256: `c6f25d8dc8faf69ec0b8482defd9e93a8eb2dde94e503bf76ac2ed7f0455fe6c`
`font_01_sfnt_off0000f6e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6E4	10388 bytes
SHA-256: `c987d82846d80d6b4556d6beac0e1c5262d08a268a99eb82b56cca1e6fd461f1`
`font_02_sfnt_off00011a52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A52	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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