Malicious PDF — malware analysis report

Static analysis result for SHA-256 960255199fdf4e80…

MALICIOUS

PDF

68.5 KB Created: 2021-01-15 14:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4361fb5777f14d7f7716e86307242c1a SHA-1: 7360a9b82c48d603b229268d7637cc8dbe17a387 SHA-256: 960255199fdf4e80bbe1c62a175df5213e92e82e1a420e765f9aa75c206fe622
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The presence of a 'download button' lure further suggests a phishing or scam attempt. While no scripts were extracted, the overall structure and URL findings indicate a likely attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?utm_term=android+recovery+mode+not+showing In PDF document text
    • https://cdn.sqhk.co/pafevola/djj0CwX/wugiku.pdfIn PDF document text
    • https://site-1167964.mozfiles.com/files/1167964/30263368710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_5f96e02d5d02a.pdfIn PDF document text
    • https://cdn.sqhk.co/wamitavixitu/ghgAuhe/fopasobugekufakipije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f8a845022b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_5fe85818cd242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_5fb8f1805138e.pdfIn PDF document text
    • https://site-1177683.mozfiles.com/files/1177683/53875398273.pdfIn PDF document text
    • https://site-1175129.mozfiles.com/files/1175129/background_editing_apps_for_android.pdfIn PDF document text
    • https://mimoberojatef.weebly.com/uploads/1/3/4/3/134316463/gufofebosapinarux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f9c20bdea492.pdfIn PDF document text
    • https://site-1172726.mozfiles.com/files/1172726/98867806722.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/remufuzu/pink_floyd_atom_heart_mother_album.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_off0000cf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0B 5356 bytes
SHA-256: 1fe7d4735025cdf8c61c088cb649152acf2f33b561e0d3bd6768a64e902b8d11
font_01_sfnt_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 10748 bytes
SHA-256: 6d4344184b8ced4c2c2f14f20c6d761a7ca6452b23dd66b544c3dc97fcbd934f

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