PDF malware analysis — malicious · 208953e63c85037d

MALICIOUS

PDF

70.8 KB Created: 2021-05-05 15:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 741baf5c87e925f024d3732d3a6e4d52 SHA-1: b9da4b67b3bd3140450613a73ee2edc661be0282 SHA-256: 208953e63c85037dc127f7bf08d8f303f8f45bf623d36307f46382e7dd6a9296

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs pointing to external websites, with one prominent URL being https://seumenha.ru/strik?utm_term=cartucho+brother+lc101m. The document's structure and the presence of many links suggest it functions as a link farm or a phishing lure, directing users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://seumenha.ru/strik?utm_term=cartucho+brother+lc101m PDF link annotation
- https://cdn-cms.f-static.net/uploads/4480750/normal_6013e2d7c89e2.pdfIn PDF document text
- https://cdn.sqhk.co/mujawiru/gSicijJ/machine_gun_kelly_drummer_height.pdfIn PDF document text
- https://cdn.sqhk.co/jenotonolo/Thgj53T/zaxizijudemaso.pdfIn PDF document text
- http://vinuwosozo.iblogger.org/varanamozusuperobitajova.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4497348/normal_5fd0989c1a764.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371807/normal_605d879f0b4d6.pdfIn PDF document text
- http://kidepokapila.22web.org/ccleaner_completo_crackeado.pdfIn PDF document text
- https://cdn.sqhk.co/winelolibug/433hfih/killer_bean_unleashed_game_download_apk.pdfIn PDF document text
- http://wemufonenirivor.22web.org/tawokevodoturetimu.pdfIn PDF document text
- https://cdn.sqhk.co/bezofusipow/Y6FgfaM/quick_and_easy_baking_recipes_without_eggs.pdfIn PDF document text
- http://sexefowox.22web.org/zujotobupab.pdfIn PDF document text
- https://cdn.sqhk.co/pigalixow/5ibJhiV/gizes.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476936/normal_6009eaa78976f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://a0758896-f8c2-4fc9-8c7e-5c1738e8bc18.filesusr.com/ugd/0ce882_cf77cfe471d24c8ea38112ea834aef41.pdf?index=trueIn PDF document text
- http://fajesunuk.rf.gd/mirazupolizen.pdfIn PDF document text
- https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_19067b50ef2c4242893b826b7ff53c4f.pdf?index=trueIn PDF document text
- http://zupotid.epizy.com/bebesovidu.pdfIn PDF document text
- http://rodumejowi.epizy.com/printable_bookmarks_to_colour.pdfIn PDF document text
- http://zalezir.epizy.com/the_hack_driver_question_answer_class_10.pdfIn PDF document text
- http://poruworetizilu.epizy.com/cellule_vegetale_cours.pdfIn PDF document text
- http://repowibozedo.rf.gd/alter_ego_5_cahier_d_exercices.pdfIn PDF document text
- https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_ed24835b55734e798cabba85cddc27e6.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cc37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC37	2900 bytes
SHA-256: `884cbfdeb878ee20e2c146b05a1641383b41b88cd86c369d761b3a8bde37f1a2`
`font_01_sfnt_off0000d68e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD68E	5100 bytes
SHA-256: `b95a1cdfc281581865b0af85d3a080e653b339e182861fcce5c9e16d7130f8ea`
`font_02_sfnt_off0000e7bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7BF	11104 bytes
SHA-256: `dade67c9834465fedebadc33e1ac8a4aeebea6388a95900237992694ff3dc16b`

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