Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fd71a329bdab02…

MALICIOUS

PDF

112.8 KB Created: 2021-04-05 20:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ac5221fe61ea09a9bfd8fface76ee9d1 SHA-1: ea0d2d2d780380550b019e4440ace2dc70264cad SHA-256: 48fd71a329bdab02baef76ba9ef653bac776102966a8efc4b19a85f46da06dba
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm designed to host malicious content. The embedded URL points to a suspicious domain, likely serving as a download source for a secondary payload. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/123?utm_term=heinz+distilled+white+vinegar+safety+data+sheet PDF link annotation
    • https://zujakeme.weebly.com/uploads/1/3/4/0/134041616/pipisuw.pdfIn PDF document text
    • http://wifonivibigi.22web.org/53346526447.pdfIn PDF document text
    • http://sedisifoxe.22web.org/21245789688.pdfIn PDF document text
    • http://kulixebuvalafin.iblogger.org/95438549701.pdfIn PDF document text
    • https://wumikedamuzu.weebly.com/uploads/1/3/4/3/134324885/zofegadewosomog-kajeror-menavo.pdfIn PDF document text
    • http://dajowefu.22web.org/92518937888.pdfIn PDF document text
    • http://jurelireroxux.22web.org/tamilrockers_2012_tamil_dubbed_movies.pdfIn PDF document text
    • https://gunimesugudux.weebly.com/uploads/1/3/0/7/130776745/5464907.pdfIn PDF document text
    • http://pavezala.iblogger.org/white_silence_book_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c7ee63-4fbc-4a24-a4c1-4148b65b2486/15414985361.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/price_of_light_brown_sugar.pdfIn PDF document text
    • http://xuvagakinev.rf.gd/free_online_order_of_operations_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/casualty_feeder_card_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9071659-cd74-4df8-84f4-376b160a2db2/dell_precision_t5500_dimensions.pdfIn PDF document text
    • http://punonawu.rf.gd/blog_website_template_free.pdfIn PDF document text
    • http://fazafof.rf.gd/animal_kingdom_season_4_episode_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50556153-e07d-4e97-bdcc-4d1faf650b54/64398692891.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/mogatifunuvegomidezufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3138c52-ab07-423f-b95a-e359a67fa26a/examples_of_descriptive_text_structure_passages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad4c184-f918-4f8e-8ee7-e9d9726fea66/59623226310.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/scratch_2_for_linux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ec97d3-4ae1-473a-8b55-f2100886ddad/gomorevil.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_off00017d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D94 5436 bytes
SHA-256: 874ba3b93685c49d3fe82118c908faf99bd260b6212ee06af7915c0051665e00
font_01_sfnt_off00019030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19030 10892 bytes
SHA-256: 89aec24bb25e4146311d8465602295a37390600e0a21922f53a82330df82901a

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