PDF malware analysis — malicious · dd6b89aebe5b5ea6

MALICIOUS

PDF

86.4 KB Created: 2021-03-20 23:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: abe8febbeee6ccb2d9e54d8d9d14f873 SHA-1: c6c12250bbefd3549fe6fb70199b8d98c23e71de SHA-256: dd6b89aebe5b5ea6f6ae3608175c02ae54aa2030235be893a65a4050367742fb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, with at least one pointing to a domain associated with malware distribution. The document body, though heavily obfuscated, appears to be a lure for downloading educational materials, which is a common tactic for phishing and malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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 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://gimoguvi.ru/award?keyword=s+chand+biology+book+class+10+pdf+download PDF link annotation
- https://javesuput.weebly.com/uploads/1/3/0/8/130873829/3956031.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377647/normal_601e15c8449bc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369632/normal_5fe6b07308066.pdfIn PDF document text
- https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/votokaguneze.pdfIn PDF document text
- http://getplafond.xyz/hoover_steamvac_carpet_cleanervl8g8.pdfIn PDF document text
- http://50offstore.pro/mere_christianity_bible_studykl9ge.pdfIn PDF document text
- https://zuberexuwaxif.weebly.com/uploads/1/3/4/5/134501439/vewiwakugo.pdfIn PDF document text
- https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/viketez-gigozasuso-muradiwuda.pdfIn PDF document text
- https://pukutititoj.weebly.com/uploads/1/3/1/3/131383613/c972f08d9a41c.pdfIn PDF document text
- http://teksalle.xyz/cobra_29_lx_eu_multi_cb_radiopu5uk.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/40ab75e2-08d3-424e-bf67-9c952f150c05/why_wont_my_amazon_dot_connect_to_wifi.pdfIn PDF document text
- http://pupagerirawax.myartsonline.com/hansel_and_gretel_bakery_barnwell_sc.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e7a181a8-e8ed-4784-9ac7-f397cced5bd8/what_is_sustainable_human_development.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5779d67a-b641-4243-994f-ec76b36c9bf3/lupelafixesebisupol.pdfIn PDF document text
- http://mufifofoge.epizy.com/assassin_s_creed_unity_xbox_one_size.pdfIn PDF document text
- http://bifiwapaz.onlinewebshop.net/how_do_you_change_an_equation_from_point-slope_form_to_slope-intercept_form.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/710c2c46-f56b-4090-89e8-66dbc49d981a/maytag_3000_series_washer_drain_pump_location.pdfIn PDF document text
- http://lulikeleweworup.epizy.com/assamese_borgeet_audio.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f651df2a-23bc-492b-9306-e4b94f5ca699/delafovewolafuka.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ede9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDE9	6016 bytes
SHA-256: `ae8a51152c00697a84c2b36a07dfc6c6874cf3284a7cc0f23a7f545ea2f5acc5`
`font_01_sfnt_off00010273.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10273	2656 bytes
SHA-256: `e55229069ed4ea77cb568e0e1ed4aaa2b8399ce823f311926fe8183f0de232f1`
`font_02_sfnt_off00010e11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E11	11280 bytes
SHA-256: `9ab5128eddf26ea3cbde14ab22ed7161e35954c2f03c7ac1c0bd69675bbb5213`
`font_03_sfnt_off000134bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134BD	16128 bytes
SHA-256: `80929bd948100b3e17223646ba66fa3a744b1b728b647f7dc2efd5017d0684e4`

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