Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5733364280c38fa…

MALICIOUS

PDF

82.1 KB Created: 2021-02-23 21:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e636bf92b73925ce1c8e931bbf2cb400 SHA-1: 55eea61f82143889bed4fba1221a57cdca8855c9 SHA-256: e5733364280c38faf5c43bb3bc556749929efcea5e8fbaf07257901eccfaf4cc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed and point to other PDFs, suggesting a link farm or redirection mechanism. One critical heuristic identified a mass external PDF link farm, with the first URL pointing to a potential Android malware dropper. The ClamAV detection and ML classifier also strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/wb?keyword=whirlpool%20duet%20washer%20and%20gas%20dryer%20reviews PDF link annotation
    • https://cdn.sqhk.co/midipumep/rig0jir/word_stacks_level_742.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/cQgejHh/tinkle_eyebrow_razor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410965/normal_5ff1f5cc4262e.pdfIn PDF document text
    • https://cdn.sqhk.co/vabedesi/Beotjic/show_yourself_frozen_road_edm_dancing_called.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/XgijcIJ/tetasosafinobedadav.pdfIn PDF document text
    • https://vazozedirasamib.weebly.com/uploads/1/3/4/0/134013018/4301447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_602b85c1ec9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_600b70e35da85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487206/normal_600f94efd8bb2.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/rekorewexidiwo/bin_opener_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/are_tp-link_switches_any_good.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/can_i_access_my_icloud_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/seper.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/adb_road_kakinada_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/51448202463.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/vazibujofokumavawenefaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/bmo_mobile_app_fingerprint_android.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/witolifi.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/24001364306.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_off00010289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 5488 bytes
SHA-256: 8f506aca6a27aac72f0591afed31c03e1e093f59a9d1cc303359febaae611596
font_01_sfnt_off0001154b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 11184 bytes
SHA-256: 43ca7f03133131e870bc7b7e620e940096b3b8f241c9b3497e373cfc37f2b0b5

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