Malicious PDF — malware analysis report

Static analysis result for SHA-256 9844b058c644b835…

MALICIOUS

PDF

77.3 KB Created: 2021-03-25 15:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1e61c69da290713f9367fee3f8b00d94 SHA-1: 806e4ff1b9f040747ae9b6239d64a58bf22e92db SHA-256: 9844b058c644b8356f33ffbceaeef0df90a0b2fc2996f229282d52391eb4507c
186 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 0.9998

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.
  • 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://pelibifir.ru/wix?keyword=seven+letter+words+starting+with+the+letter+c PDF link annotation
    • http://badgesverified.com/kenmore_elite_calypso_washer_repair5sn6r.pdfIn PDF document text
    • http://copyright-infringement.business/what_is_the_story_of_hansel_and_gretelr1day.pdfIn PDF document text
    • http://yourlivehelp.com/what_is_resistance_training_exercisessg7ig.pdfIn PDF document text
    • http://hisgohar.site/66214869138yg35a.pdfIn PDF document text
    • http://tiktokfrance.fun/rhetorical_strategies_ap_lang_essayogko4.pdfIn PDF document text
    • http://bodyita.space/bidaluk80upj.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/5d90bd6d-3c38-4e94-a2f9-5744c30ecc02/purple_music_note_emoji_copy_and_paste.pdfIn PDF document text
    • https://aab2087d-815a-456c-83e1-90c1c0987769.filesusr.com/ugd/1d3654_8d18bc65b5374c67af06950d248599ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/gubafubevetoni.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/giwigumago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbb0173-3d25-4921-9255-bfa68bf95a5e/what_causes_plates_to_move_in_different_directions_and_speeds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa899a36-6c46-486c-82fb-f9e271cea033/libulitulazegabif.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/fnac_report_result.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_79592c5a198b4f378bc7006dcb82c9c0.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_38d2f8bb30e14fa092d5332af6e4ea8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc56e81a-1fe5-4944-9a02-80d6a1c942a4/pumelimamorufivi.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/unclog_garbage_disposal_double_sink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04f9747-93d6-4054-b021-ab0d847ea369/50836396441.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_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 5456 bytes
SHA-256: 8d182792a9e295556a767bbb49387c9c95b49e369cb37c823b6d34f6a3d95001
font_01_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 10780 bytes
SHA-256: 5033254b4ddb83048b2774a4769056d4f0c4dd0bf7dd81e368c0479466c2bb8c

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