PDF malware analysis — malicious · 976c21e7c93dbfd6

MALICIOUS

PDF

90.8 KB Created: 2021-04-01 18:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: e55c59949ae55f6237639dd3eb30f5b2 SHA-1: 528978c0fec7caadefbd88809acb9336fb387abf SHA-256: 976c21e7c93dbfd695410bd9a12761d91106249dc9ff548b185ceba19b576696

176 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. It uses an "enable content/editing" lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

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 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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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://pelibifir.ru/wix?keyword=parts+of+a+fish+worksheet+for+preschoolers PDF link annotation
- https://cdn.sqhk.co/gosuzufus/ghciaic/deemo_ii_ios.pdfIn PDF document text
- https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/99b2c0175.pdfIn PDF document text
- https://cdn.sqhk.co/pigajifaw/y5msjb4/xenoxakulibenoned.pdfIn PDF document text
- https://cdn.sqhk.co/burexewejam/cGnduKR/31212405732.pdfIn PDF document text
- https://cdn.sqhk.co/zuboxizip/jdYqLha/rankle_master_of_pranks_brawl_deck.pdfIn PDF document text
- https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/222cdada6c72.pdfIn PDF document text
- https://cdn.sqhk.co/zebimapajod/JRLjeAP/love_and_respect_book.pdfIn PDF document text
- https://burodinijosago.weebly.com/uploads/1/3/0/8/130813714/38d026c6d.pdfIn PDF document text
- https://cdn.sqhk.co/nifodotiriru/ejcdjjO/tilorobidejigirezeri.pdfIn PDF document text
- https://cdn.sqhk.co/xexegapimuwi/ggGV3Qc/uk_cruise_companies_list.pdfIn PDF document text
- https://cdn.sqhk.co/fimegasaz/geOKRS9/vugalodew.pdfIn PDF document text
- https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/8571212.pdfIn PDF document text
- https://cdn.sqhk.co/dedizozife/0k9cieC/48752600985.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/mipizaju/62459259933.pdfIn PDF document text
- https://s3.amazonaws.com/tobojelusiwi/what_happens_if_your_home_thermostat_is_not_working.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bee929c8-1239-4038-a7df-24b1e4cf2ce6/where_is_the_filter_located_on_a_kenmore_dishwasher.pdfIn PDF document text
- https://s3.amazonaws.com/zonebon/whats_another_synonym_for_lethargic.pdfIn PDF document text
- https://s3.amazonaws.com/fajeloninesitel/save_game_god_of_war_ps4.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a9bea25e-f035-4598-8f15-2c10ff3293aa/kowururevutopal.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d98dc569-0548-42d6-b217-a26e2c49781f/whats_wrong_with_the_purpose_driven_life.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/efbe41c8-a2e0-404a-87bf-3dc2c66f76d1/bazakaliki.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9040178f-a479-43ce-a652-93e19269999e/jokiveboximuwugubol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/96bcd4f1-b8f3-4192-a85c-79d8484a2e07/bluebook_legal_citation_examples.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2f7d9ac6-c1ee-4864-a066-dbcb6590d407/race_car_vehicle_dynamics_ebook_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41218d98-c44e-4797-84d2-3de54bd9e989/what_is_energy_cold_brew_at_dunkin_donuts.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_off0001241a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1241A	5260 bytes
SHA-256: `561482d90d90ef0d6a12d5bb37ccee2a2b929a6d1b5d7c4a512e0529b06db924`
`font_01_sfnt_off0001360d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1360D	11640 bytes
SHA-256: `b7592b70f5378297f7d1d9454fb2f02037cf8d87918f54e78a40cc79af9e95e7`

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