Malicious PDF — malware analysis report

Static analysis result for SHA-256 074cbc526abda6a8…

MALICIOUS

PDF

76.6 KB Created: 2021-05-13 06:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 141cbf7583ffa568eca15fb4622c2e32 SHA-1: 95cee14513adfa955cf0b0a103e2b96a7257d1d4 SHA-256: 074cbc526abda6a8c8ae828551d5b4aa35e71f37d3b2978a2db194ab8e788bf7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a likely attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to wkhtmltopdf and Qt, suggesting it may have been generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=can+you+cook+chili+in+a+crock+pot+without+browning+the+meat PDF link annotation
    • http://top-odejda.com/lulikokisivifekojarujas7o5au.pdfIn PDF document text
    • http://steblin.pro/39450663512mshdc.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/7610936.pdfIn PDF document text
    • http://astrology-personal.online/zosogujasebezigabobabvuds.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/fac519f6d90bf.pdfIn PDF document text
    • http://reduslimitaly-official.site/19243460537k0mkx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_605c2c600d885.pdfIn PDF document text
    • http://itanto.space/how_to_fix_a_washing_machine_that_does_not_spinhxmey.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/LuRgeTc/3_tamil_movie_background_music_ringtone_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5fd78b0064769.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/3048428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490365/normal_6029a45a35e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/arjfjjO/metevepazapakad.pdfIn PDF document text
    • http://kungfumalibu.com/8609451208brl9t.pdfIn PDF document text
    • http://bupetud.xyz/necromunda_underhive_wars_story_walkthrough8e84o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428039/normal_6051a33fea4b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_602504d2c4a4f.pdfIn PDF document text
    • http://trysucre.pro/xumajodoserewulilexulog9ski2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_603020e551376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415974/normal_5ffc8a114fc5c.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/rZjiiiW/picsart_nature_background_hd_images_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ahiTiiz/first_words_for_baby_foods_4_months.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 5472 bytes
SHA-256: ab8026c92bcd54c878e98e193eac7d94e8b5d51e89f560e049c2a2db91595737
font_01_sfnt_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 11044 bytes
SHA-256: ab62f2b2bf535d890ddd533385d46723a90568d7d8a49ea6bf181c36cac3b6bf

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