PDF malware analysis — malicious · 565666c421af5fa3

MALICIOUS

PDF

77.0 KB Created: 2021-04-18 00:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 3813c7192ccc5cb041a57037e4fa5b45 SHA-1: 5840aecaa6238d594dd9a621c1b18e447a6add82 SHA-256: 565666c421af5fa321858ada35a7e5baf6304d35e7c0a7fe1fd030aa40c08400

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 a callback-phone (TOAD) 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-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.
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://dafemum.ru/strik?utm_term=complete+works+of+swami+vivekananda+audio+book PDF link annotation
- https://static.s123-cdn-static.com/uploads/4471230/normal_5ff143fc8e717.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502870/normal_6051e98e5eb84.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417318/normal_6024f1d888a01.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426819/normal_5ffcaabab9c9b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367625/normal_602e0068d2f31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446635/normal_606cae8bc97a6.pdfIn PDF document text
- https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/kivor.pdfIn PDF document text
- https://xuwogojike.weebly.com/uploads/1/3/1/3/131380868/wawakatewerav_fifepabodoru_juxinusodiw_jexibenuve.pdfIn PDF document text
- https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/6670827.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/vaxebisapesi/22395840937.pdfIn PDF document text
- https://s3.amazonaws.com/wovedukevikov/wufemux.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9ee4fdd3-5368-4186-91b6-630977270747/a_streetcar_named_desire_movie_plot.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1376ba44-defa-4224-97ba-407781286a11/28652187427.pdfIn PDF document text
- https://s3.amazonaws.com/kotenu/coffee_table_book_psd_template.pdfIn PDF document text
- https://s3.amazonaws.com/gazivemon/biwekigijutag.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/094d6895-0e84-4bb5-b752-19b30ce2d026/will_after_we_collided_be_on_netflix_south_africa.pdfIn PDF document text
- https://s3.amazonaws.com/xakajoziwibi/the_giving_way_to_happiness_download.pdfIn PDF document text
- https://s3.amazonaws.com/vavabi/pinubizijijixo.pdfIn PDF document text
- https://s3.amazonaws.com/nalifij/discounted_cash_flow_valuation_excel_template.pdfIn PDF document text
- https://s3.amazonaws.com/daxemo/body_systems_review_worksheet_middle_school.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3ee70f2c-bbc4-4286-951d-5a9a2cc91011/how_do_you_change_the_battery_in_a_roomba.pdfIn PDF document text
- https://s3.amazonaws.com/rivazixexuguri/ygopro_blue_eyes_white_dragon_deck.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aeabcc9f-d928-477d-9c4f-23673163b405/black_and_decker_coffee_maker_12_cup_stainless_steel_program_cm4000sc.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_off0000ee05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE05	5448 bytes
SHA-256: `af4083fdde885de9b7061c32202cc8ac8f84154d50efa64ac025b95a519a2477`
`font_01_sfnt_off00010087.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10087	10964 bytes
SHA-256: `756acc21e51caabf04740811747d55f81d58afb71ad1b56db18996594b98483f`

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