PDF malware analysis — malicious · d68143319eef8d33

MALICIOUS

PDF

86.9 KB Created: 2021-03-28 21:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 0758c5c6a9e2a96cdc7cf1f1300dbe3a SHA-1: 71ccc63561b6a1909d771f0dea65cab87112ba57 SHA-256: d68143319eef8d33bed94f4a64bef238cae4fae6d2879baac0099b948002121e

134 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 0.9993

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 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.
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://bologen.ru/award?keyword=anorectal+malformation+journal+pdf PDF link annotation
- https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/4270001.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494868/normal_5fe64e39dddbd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417429/normal_604657c846f91.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471235/normal_5feca1f7763f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392191/normal_60295a85c5e22.pdfIn PDF document text
- http://pivojowemetobiv.mywebcommunity.org/importance_of_behavioral_science.pdfIn PDF document text
- https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/a17c024.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481528/normal_6023f1d15679b.pdfIn PDF document text
- http://gafuvufafokujop.sportsontheweb.net/exemplo_de_caderno_de_encargos.pdfIn PDF document text
- http://bimoriz.getenjoyment.net/altruism_theory.pdfIn PDF document text
- http://momegitufog.22web.org/wesisuxikopufolirezubifif.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/rupatojuko/23589803327.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4af001fd-73ce-488a-9c24-ee11c6dcc545/mujiza.pdfIn PDF document text
- https://s3.amazonaws.com/fowikorejodi/34624455247.pdfIn PDF document text
- http://mimafesajasi.rf.gd/xokuxirat.pdfIn PDF document text
- https://s3.amazonaws.com/jujadodedaruxix/4768830594.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6bdd750a-85f7-4937-8719-30b35080a960/bogibefe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9720c118-8003-4526-a9f1-55518ff6412c/51716298656.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f2dc25b2-07ec-4a00-bfc2-c1407f457085/accuplacer_college_math_practice_test.pdfIn PDF document text
- https://s3.amazonaws.com/padanivozeb/awadhesh_premi_ka_bhojpuri_gana_video_ing.pdfIn PDF document text
- http://jisunopesaluzi.atwebpages.com/alphabet_board_games.pdfIn PDF document text
- http://kafokapiwek.rf.gd/hepatitis_c_virus_transmission.pdfIn PDF document text
- http://desakoda.rf.gd/tolivekinixobinot.pdfIn PDF document text
- http://soranodabiwegi.myartsonline.com/ziginokoxel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1fd1d80f-dfca-485b-8a72-99a9b4371577/codes_and_conventions_of_tv_drama.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_off00011617.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11617	5188 bytes
SHA-256: `f997057de39acef89f4d31f0fc2b76df7cca4c07b2577e21872f3018ada5f985`
`font_01_sfnt_off000127ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127AE	11436 bytes
SHA-256: `e80f515a5e183ec52316907e74c6f8a1c2caee0c9911625822c20317143ed18b`

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