Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec32e48b51b06969…

MALICIOUS

PDF

138.9 KB Created: 2021-03-01 00:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d8aacfbf628f6e62a78480a2390abcf1 SHA-1: d1c17010be85e549ab10bf50bedd2a387a0a5a84 SHA-256: ec32e48b51b069695dbfa73503f07d85a95aa2a66fb024930d23d9e6598f2aa1
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, appears to be related to intellectual property, likely a lure to encourage users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/award?keyword=the+responsibility+of+intellectuals+pdf PDF link annotation
    • https://vobolatit.weebly.com/uploads/1/3/4/3/134349562/6436947.pdfIn PDF document text
    • http://delaem-sami.online/what_is_the_unit_of_enthalpy_change_of_solutionia6fk.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/nexuguvij.pdfIn PDF document text
    • http://ecoservice-vlad.ru/4226127657bmwms.pdfIn PDF document text
    • https://keboxineb.weebly.com/uploads/1/3/0/9/130969034/vorikibelikix.pdfIn PDF document text
    • http://remontnatali.ru/esquema_oracion_simplepbkii.pdfIn PDF document text
    • https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/titofez_dogonugoj_xuxawizivi_bezine.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/e1ad6f79501a08b.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/hiiJMQP/tie_dye_sweatsuit_set_womens.pdfIn PDF document text
    • http://centerbluebadge.com/rigizikatuxufejipe3pf07.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/dee73a7927b.pdfIn PDF document text
    • https://javisifuwo.weebly.com/uploads/1/3/5/3/135304639/sanajexik.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/selebuwopitepux_divepofosof.pdfIn PDF document text
    • http://savadaqwe.space/how_to_connect_bluetooth_turtle_beach_to_pcxyr84.pdfIn PDF document text
    • http://arnautmebel.ru/framed_ink5kepw.pdfIn PDF document text
    • https://tumizoma.weebly.com/uploads/1/3/2/8/132814974/dibuwu.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/wokesabisevo/whatsapp_stickers_android_app_nulled.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/challa_uri_movie_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/chicago_sun_times_sudoku_answers.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_off0001e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E61A 5432 bytes
SHA-256: 491656e5fa360514e888510767f2fee16db65c9d7f87bdcc56035ef3cd2ed7f3
font_01_sfnt_off0001f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F890 11476 bytes
SHA-256: 0b075f3ed6b31636ded0f738980610372bbe0c8231f5ae5f0f935815c422a363

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