Malicious PDF — malware analysis report

Static analysis result for SHA-256 99422648ff6ad5b6…

MALICIOUS

PDF

82.5 KB Created: 2021-02-10 07:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 913e4ba7016786da06577182da60e1ff SHA-1: b390b98d78fb63c2c399944b5e9644cb41701dc9 SHA-256: 99422648ff6ad5b6d2c40dbb5365124c9789aca3ca7aed64377bfc73d315d42b
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://crophysi.ru/123?utm_term=final+cut+express'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/123?utm_term=final+cut+express In PDF document text
    • https://cdn.sqhk.co/waxolulum/zgmghH5/gupuwovosekowigofipo.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/gehggcC/77071360594.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/2hfcBdn/guraluvesivuka.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/gVhadBa/28383486644.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/CgfUlhg/8516881661.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/zjbjgTg/can_knockdown_2_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/jhc2kia/82494661712.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/hj66hfI/safipiwadosujepeji.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/nighfhi/othello_movie_1995_soundtrack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/stinger_virus_removal_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/california_shutters_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/smoke_on_the_water_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/gazunitasoveki.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/bhse_onkelz_alben_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/37633291674.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/xivibi.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/pukesorenizuxepufulojezap.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/antivertigo_drugs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 4720 bytes
SHA-256: acd49fbbc32cb694fa60d752f1e89a5154dbe4110c4925c2cd14745a5240721b
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 11344 bytes
SHA-256: 9d79965c3c17fc21005faff8bbfb807e143c57d69840d6b3c4aec6f0e8125a8b
font_02_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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