Malicious PDF — malware analysis report

Static analysis result for SHA-256 969e6d962c4cde91…

MALICIOUS

PDF

74.9 KB Created: 2021-04-08 06:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 57b154301669896e956e9fd8a770371f SHA-1: e814ecc558f62099673eeee4d8daec21ad35b164 SHA-256: 969e6d962c4cde917fec3d33c8f512d8aa5f121af63e643eec12b956f795857b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('mezovuduw.ru') that is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a potentially malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=how+much+does+it+cost+to+run+a+12000+btu+mini+split PDF link annotation
    • http://gizigevom.mygamesonline.org/26744856334.pdfIn PDF document text
    • http://yachtcharter.group/i_wanna_iguana_persuasive_lesson_planrja98.pdfIn PDF document text
    • http://itverys.space/69319893346snixh.pdfIn PDF document text
    • http://lnstagramsupportlives.com/4754721021ez0h8.pdfIn PDF document text
    • http://ipoteka.net/mumedunezopunovikivodowhkt6.pdfIn PDF document text
    • http://greenbike.shop/bestwap_video_song_2018_djpgyvq.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/80397153625.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuguzametekobo.myartsonline.com/rational_numbers_class_7_ncert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e94a1e8-553f-4ef6-a530-282f6bfb888f/simple_interest_sums_for_class_7_icse.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_680c3fae8d79422c9157d86d9e786257.pdf?index=trueIn PDF document text
    • http://pujizugikejoxa.rf.gd/n64_emulator_free_for_android.pdfIn PDF document text
    • https://5e04165b-6ab1-49a6-9937-45006fc2fbeb.filesusr.com/ugd/d19879_37b135cb921146bebdf788fa0933dc1b.pdf?index=trueIn PDF document text
    • http://jiregaruxu.rf.gd/37910264476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278d9433-1ff1-4b95-a117-b37d01133385/27332386192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81eb6da6-96c7-412d-96fe-5b905141ddfa/bovadogofad.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_907b287bfd1c4c05a247dd03bb56e55c.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_fd6a0edc11db43d0a2890e6c717a5a06.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_09d1dc052f714e89bd0f30011798707f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0becf4b-d98b-47d1-82d8-d67a7176c1e8/how_to_get_bill_of_sale_form_dmv.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_a27c0c48f781472bb9c176bad7e51fa4.pdf?index=trueIn PDF document text
    • http://rigitusavogu.epizy.com/aptitude_test_preparation_apk.pdfIn PDF document text
    • http://xovogig.epizy.com/fewozowujo.pdfIn PDF document text
    • http://silimafimutoj.rf.gd/learning_basic_grammar_book_3.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/88303585659.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_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 5832 bytes
SHA-256: 0e3c3b7e200181c412673d2ad4872ae7394d6a4a38772cb140ca555e9c76b9dd
font_01_sfnt_off0000f730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF730 10748 bytes
SHA-256: fd3b877e149262cf4c6f6828b26b7fa66fd6b30724781730e2a1a4b14dddc35b