Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd894f31c79c9db…

MALICIOUS

PDF

74.0 KB Created: 2021-03-17 01:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4571ff48263ad9e69c776a47551db7ae SHA-1: 5e29b4541400146b0b1c0a6ffde184c9b7b7edbe SHA-256: dcd894f31c79c9dbc1895ebe07663705c5b8406d2acfee5a87dd69e43dc5c3e6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9995

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 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.
  • 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://golowaki.ru/strik?utm_term=how+many+ounces+in+small+dunkin+donuts+iced+coffee PDF link annotation
    • https://cdn.sqhk.co/vonixilavot/QHgfieA/20198811451.pdfIn PDF document text
    • http://tajawuxelefa.22web.org/what_is_the_effect_of_germination_on_the_rate_of_cellular_respiration.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/4ig3hjF/werirereluroxewosu.pdfIn PDF document text
    • https://cdn.sqhk.co/balemarize/gjjbrjb/best_alarm_clock_app_for_macbook_pro.pdfIn PDF document text
    • http://ludoviguboxulu.22web.org/kusum.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/hihidgh/raspberry_pi_zero_pinout_voltage.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/pululusodogi/ladarejurifaxosimizos.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/83215122281.pdfIn PDF document text
    • https://c05d8b73-d39f-4c49-b1ba-f5f4f4c97c14.filesusr.com/ugd/d55797_1411d4cf02624838b7dfe7dedd102347.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/44544257913.pdfIn PDF document text
    • http://bezafesu.rf.gd/art_in_focus_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/93657463257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1088f51e-d88d-4fa5-a5cc-80584de0eaa2/dewalt_table_saw_dwe7491rs_dust_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7dc9a1-8cb5-40d4-aa42-1e880b85f7f3/77298854853.pdfIn PDF document text
    • http://jipowefata.epizy.com/nappily_ever_after_movie_netflix.pdfIn PDF document text
    • http://jelenexej.rf.gd/muvewujomilede.pdfIn PDF document text
    • http://pagupim.epizy.com/xusinawoxoxakagezafam.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_9e8e71715ce04f368152987cf02919db.pdf?index=trueIn PDF document text
    • http://jatuxijor.epizy.com/gejarajididujapuxemafa.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_56ee3789768b49f3ae4c526266788444.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_1611c2c0ebe14583ba617a0005442ffa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3ea43f-6c38-4f3f-9613-bc1f7141c6b3/searle_social_construction_of_reality.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.

FilenameKindSourceSize
font_00_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 5292 bytes
SHA-256: 3b925ada498c7873028f0f51d7adcf5495f8e0c56ce3b2be6e38c0f437f93098
font_01_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 10664 bytes
SHA-256: f7f8d8331d2d7fcd45c6583fc46dc41348646ee02eec0e6c146a8dcfbab1cc7e

Open this report in the interactive analyzer, or submit your own file for analysis.