Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5c5a52740d80e2…

MALICIOUS

PDF

88.0 KB Created: 2021-05-11 03:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07ffb2630e89f40e1dd16caef5918307 SHA-1: b201acdfdfe54e72fa068ecac06c97229f9f2af5 SHA-256: 0f5c5a52740d80e2758a3906f45b6bf4a45659afe4c30b9ae4a481b1e732f7dc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be related to a game review, likely serving as a lure. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=final+fantasy+xv+royal+edition+review+ign PDF link annotation
    • http://kazerurido.iblogger.org/xitegatexe.pdfIn PDF document text
    • http://natikolom.site/elementary_english_grammar_and_composition_for_class_8_solutions5r1yn.pdfIn PDF document text
    • http://geniusenglish.space/55954665833pryjt.pdfIn PDF document text
    • http://topcreditcheck.info/84206677514lhnyt.pdfIn PDF document text
    • http://reassurez-moi-fr.info/22171701064dzfte.pdfIn PDF document text
    • http://bobiruropiles.22web.org/car_bill_of_sale_massachusetts.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/remeranexe/19197653910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f839b524-f082-4973-8224-6f1c3f39c788/64236983428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34787177-14cc-4ca0-b543-9f2f93f7cc95/jusomilodara.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/kaplan_8_act_practice_tests.pdfIn PDF document text
    • http://kedaxesipuwid.epizy.com/les_appareillage_electrique.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/xamarin_android_get_assets.pdfIn PDF document text
    • http://lokemupuwife.rf.gd/the_fourteenth_goldfish_sequel.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/estar_present_form.pdfIn PDF document text
    • http://rositeweb.rf.gd/how_much_does_spaying_or_neutering_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/58293594897.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/nine_algorithms_that_changed_the_future.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.

FilenameKindSourceSize
font_00_sfnt_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 3460 bytes
SHA-256: f45b04ec5aa48b7ceb9c72bef452314e6f4cfbae0c9d3795bba3a16533a6c97c
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 5352 bytes
SHA-256: 6d8cc6e414c1c9c4dc78d3038e97e3902ba4d4a20631e491b490eaab599d2dd1
font_02_sfnt_off00011481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11481 10664 bytes
SHA-256: 1ec539d8ef8badb28a835e4993e7e3cffcfd17945b48fa8805df18ca65ca1bc2
font_03_sfnt_off0001391f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1391F 17920 bytes
SHA-256: 605a05fefaaa39997ef725a99888f1148ed4b64b53780ea1066b2ff1ae2ada71

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