Malicious PDF — malware analysis report

Static analysis result for SHA-256 f322e2bc5ffe8caa…

MALICIOUS

PDF

78.2 KB Created: 2021-03-22 19:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aeac623af203e0965907bb6cec51a31d SHA-1: c8777ca9ebf342dc030160cf65b38a5573f6335f SHA-256: f322e2bc5ffe8caa12f5c9977c419df2d6e5b96d999a52fdeacfd2b62f9cc617
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to appear as legitimate content. The primary lure appears to be related to installing printer drivers, with a prominent link to a redirector URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/aws?utm_term=how+to+install+hp+lj+1012+on+windows+10 PDF link annotation
    • http://subbellassecret.com/advertising_media_workbook_and_sourcebook80kp9.pdfIn PDF document text
    • http://tesocoin.online/what_is_flock_mean_in_spanish7gqdd.pdfIn PDF document text
    • http://1fps.ru/33446143150j5601.pdfIn PDF document text
    • http://cybety.xyz/free_download_dirt_xtreme_mod_apk3za6p.pdfIn PDF document text
    • http://trokot-newshop.online/59499117697dgax6.pdfIn PDF document text
    • http://betflixguvenilirmi.com/cambridge_english_advanced_cae_2_students_book_with_answersqxmbo.pdfIn PDF document text
    • http://jadebey-x.com/what_was_the_main_purpose_of_antitrust_legislation_passed_by_congresszp9nd.pdfIn PDF document text
    • http://acgmgroup.ru/antony_flew_booksqclw3.pdfIn PDF document text
    • http://datingsexchat.site/centrifugal_pump_problems_answersowggn.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/bifadiwuwileji/bissell_9595a_cleanview_bagless_vacuum_with_onepass_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/how_to_read_dog_food_feeding_chart.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_6fbfcfda1d8a4209b2c1ede319906f97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/bafumefiwirerokofisugoro.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/97500430478.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/kusazax.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/revell_plastic_model_kit_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/medicare_benefit_policy_manual_chapter_6_section_70.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814e6d3d-ea67-42e1-8cc3-793df5bc3a5b/81165675112.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_7eb81c1c72684767b08b698130d48304.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69bc397-afff-485d-a804-9ea92a9604d6/baxefupija.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/50454191581.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_70742d4b77004d60b30d9f003056d43f.pdf?index=trueIn 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_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 5404 bytes
SHA-256: 6f5d90bd79ad25cec74a2382bd98415649e3555a365b0e4fc71bccd0af10a13b
font_01_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 10720 bytes
SHA-256: 7735e3466c8edf6cac6cdeb8c7a0a8a700efe8cfd5ab5fdecbed5758a279fe26