PDF malware analysis — malicious · afbd16cb46268285

MALICIOUS

PDF

150.2 KB Created: 2021-02-21 02:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: df802f7a030b318ff46853e2650c5f1d SHA-1: 6522fa8e64957e5262bf08ebf1efdf61abdc8f1d SHA-256: afbd16cb4626828597f84a78536da22b754fc8df3e576cf828c9c928ab5b269e

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a fraudulent number, likely for a tech support scam or billing fraud. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing campaign, potentially using embedded JavaScript for malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://jacksth.ru/123?utm_term=craftsman+lt+1500+silver+edition+parts PDF link annotation
- https://cdn.sqhk.co/lepavenujal/gjjeVMQ/zexowegeditakomanurimu.pdfIn PDF document text
- https://xozugovapotup.weebly.com/uploads/1/3/1/1/131164024/falidet_wudivosigivegiz_xanarixuke.pdfIn PDF document text
- https://cdn.sqhk.co/vafegijateno/hcmmttP/26312813949.pdfIn PDF document text
- https://cdn.sqhk.co/duxadikoti/giiazhe/nenupepeladatoxelaxoj.pdfIn PDF document text
- https://cdn.sqhk.co/palevisi/jdmAQgq/bug_bite_thing_shark_tank_update.pdfIn PDF document text
- https://cdn.sqhk.co/bovokolel/WfhiYiL/top_music_player_windows.pdfIn PDF document text
- http://kopavavabigi.66ghz.com/bahubali_3_film_full_hd.pdfIn PDF document text
- http://bevurib.22web.org/9460077883.pdfIn PDF document text
- https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/vifugagukekelum-buwaguxeko.pdfIn PDF document text
- http://netusikofigo.22web.org/kinergy_corporation_ltd_annual_report_2018.pdfIn PDF document text
- https://cdn.sqhk.co/kedilexele/fYifPje/biladefono.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://babudenipovux.rf.gd/bigavozanefelile.pdfIn PDF document text
- https://s3.amazonaws.com/sowewazulejewi/hitman_blood_money_house_of_cards_guide.pdfIn PDF document text
- https://s3.amazonaws.com/penefelomiju/42029588874.pdfIn PDF document text
- https://s3.amazonaws.com/kufazete/lotro_beorning_guide.pdfIn PDF document text
- https://s3.amazonaws.com/vebogotexaf/farawevina.pdfIn PDF document text
- https://s3.amazonaws.com/tuletivotarupu/cession_de_droit_au_bail_commercial_formalits.pdfIn PDF document text
- http://guwavamo.rf.gd/civics_class_10_chapter_1_question_answer.pdfIn PDF document text
- http://nezopodadas.epizy.com/9750965187.pdfIn PDF document text
- http://tuzibepunu.rf.gd/deed_of_sale_template_for_car.pdfIn PDF document text
- http://pulawev.epizy.com/connectwise_university_report_writer.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001f99c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F99C	5468 bytes
SHA-256: `119a3780881c09705b6e88d12aee18d39f3fb231783caa9d44fe18731562708d`
`font_01_sfnt_off00020c2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20C2C	12540 bytes
SHA-256: `778d636101428d5315f1327e59205c651695d8038ccc26a011ba6d6edb7a9d83`
`font_02_sfnt_off0002358f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2358F	16060 bytes
SHA-256: `ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833`

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