PDF malware analysis — malicious · 3d800e073dd01163

MALICIOUS

PDF

68.1 KB Created: 2021-01-31 16:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: afcbb65f004f606d785945327d57489a SHA-1: 03ec0e86d937847a7e50d07a56932f8cb2a770b0 SHA-256: 3d800e073dd01163579c39b966767934f91cb58dad9ed625f68181b3188517af

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to exploit users through deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://druttle.ru/123?utm_term=courtesy+call+lyrics PDF link annotation
- https://cdn.sqhk.co/dukosisevu/MBhcgd9/vikings_game_today_score.pdfIn PDF document text
- https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/sabuworape_jowawifez_debimadukoza_lupiwarivoxumi.pdfIn PDF document text
- https://cdn.sqhk.co/dafisuwikib/jcaRji6/metal_horror_escape_pc.pdfIn PDF document text
- https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/demisasigezulezewidu.pdfIn PDF document text
- https://cdn.sqhk.co/pixafosabow/hbOpDid/subway_traffic_racing_car.pdfIn PDF document text
- https://cdn.sqhk.co/gajerivab/hhcHvid/tagokoxivigifem.pdfIn PDF document text
- https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/kadetawur.pdfIn PDF document text
- https://cdn.sqhk.co/daxozazon/gifYgHD/stickman_ninja_fighting_games.pdfIn PDF document text
- https://cdn.sqhk.co/sivefuxonix/Wp3ifjj/flipper_movie_theater_in_hollywood_fl.pdfIn PDF document text
- https://sewetinupas.weebly.com/uploads/1/3/3/9/133997680/7579349.pdfIn PDF document text
- https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/bevigejef.pdfIn PDF document text
- https://wajevubal.weebly.com/uploads/1/3/4/6/134687537/3159146ed37a.pdfIn PDF document text
- https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/zofilaxagosudik.pdfIn PDF document text
- https://cdn.sqhk.co/jogekiluse/dggCieu/39510236129.pdfIn PDF document text
- https://xafituku.weebly.com/uploads/1/3/4/8/134863640/ripapa.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/towutoginadivu/95140678569.pdfIn PDF document text
- https://s3.amazonaws.com/paxunu/89540811850.pdfIn PDF document text
- https://s3.amazonaws.com/juvosi/sbi_international_atm_debit_card_application_form.pdfIn PDF document text
- https://s3.amazonaws.com/wunupalezozerud/play_candy_crush_online_free_no.pdfIn PDF document text
- https://s3.amazonaws.com/gonima/the_darjeeling_limited_full_movie_hd.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_off0000c90c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC90C	4800 bytes
SHA-256: `74100034d1eb5a983a334494d4bc79345077d9eb365a51efab0835d70440e40d`
`font_01_sfnt_off0000d970.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD970	13408 bytes
SHA-256: `9431ddd1d03730e7db44564f73f158bb08af1c148a99ad9ef3b74e2e255b7af1`

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