PDF malware analysis — malicious · 5f2dde21e7cb4970

MALICIOUS

PDF

71.3 KB Created: 2021-03-18 23:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: ecd0a87622ba76e08a03972a7fed60fa SHA-1: 095f9d6d8c330ab71dd6d8d592180bf84f0dfd36 SHA-256: 5f2dde21e7cb4970ecc16cbb272b236011cb1a316da7b0c8c1340523f6394c8f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content.

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://druttle.ru/123?utm_term=elara+marsden+park+design+guidelines PDF link annotation
- https://cdn.sqhk.co/zanotunuzi/hbVWwHi/55816478917.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481273/normal_601dbd53cc072.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386086/normal_5fda6fbf21df3.pdfIn PDF document text
- https://cdn.sqhk.co/zigimovovu/GjkBTjj/back_to_the_moon_movie_download.pdfIn PDF document text
- https://cdn.sqhk.co/labifikup/ggdfdTL/get_followers_on_instagram_free_app.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450512/normal_5ff2540913aa2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_f136d583d7f944589bff45dbdf6df74f.pdf?index=trueIn PDF document text
- https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_c01645688b5c41328882726aa498a1f5.pdf?index=trueIn PDF document text
- https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_35772d15bac742d98ab270bba4a478d0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nafibanefexex/13195872980.pdfIn PDF document text
- https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_29bbaf76031a4bcb9761bc04b5bd4052.pdf?index=trueIn PDF document text
- https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_08d4334d4b2044a8ad93ab3702d016e5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sefipa/zefonomawenibasalubaja.pdfIn PDF document text
- https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_820d0b8e5f2a47c3ada18c7a759b5bf4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tasufagijaremo/bolte_bolte_cholte_cholte_song_ringtone.pdfIn PDF document text
- https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_c85abe0b5c98403e98fdd92e92ff600c.pdf?index=trueIn PDF document text
- https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_72ae36131653462b9614048f65d30e91.pdf?index=trueIn PDF document text
- https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_816cf322eb8648a485c9dd1a9118cf67.pdf?index=trueIn PDF document text
- https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_742b75179bb44ea79ac0aea36c424243.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_off0000d7a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7A7	5300 bytes
SHA-256: `8de384dfb2c0ebb05cb28574f48094d76e03ddc956f82c5231db50f7fc0e0f84`
`font_01_sfnt_off0000e99a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE99A	11312 bytes
SHA-256: `e0c2640da167eaa1897f41c112eb61c9ddf667b3aeb27bbe898f48787b169a46`

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