Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8b245cd492c6af…

MALICIOUS

PDF

70.3 KB Created: 2021-02-06 15:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9a6140c681779e2dc4f7696d75acc6e2 SHA-1: 364e9d089965c0d835157ba7430feabee2a627c2 SHA-256: cc8b245cd492c6af9d5fbf908b142e26f00f3d8cfac3cf59668513eb7d5d9fbf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful content. The document body itself is largely unreadable, but the presence of URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wb?keyword=b.%20ed%20ignou%20date%20sheet PDF link annotation
    • http://pubguckazan.com/definition_distribution_de_flyers_par_la_postecbkmy.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/satutoxobe_kupotewik_valileruwa_warenuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc6aeaacd683.pdfIn PDF document text
    • http://stonersfranchise.com/98048720634i6xh3.pdfIn PDF document text
    • https://putumilaw.weebly.com/uploads/1/3/1/3/131380263/39006903b95081.pdfIn PDF document text
    • http://1eyvgo.xyz/98421023566oe14.pdfIn PDF document text
    • http://xivetaf.22web.org/jabezifimewegifobawewudi.pdfIn PDF document text
    • https://kigolaris.weebly.com/uploads/1/3/1/3/131380971/peximezoxe-mugewuwinole.pdfIn PDF document text
    • http://lumacy.site/111100539228cy6e.pdfIn PDF document text
    • https://zofekumu.weebly.com/uploads/1/3/4/7/134741387/girifazarapepud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_6014a01a38896.pdfIn PDF document text
    • https://jafedojinow.weebly.com/uploads/1/3/0/9/130969492/4354959.pdfIn PDF document text
    • http://hookup153.site/maruti_swift_dzire_front_shocker_priceskia2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bomesesif.epizy.com/cs_go_aimbot_wallhack_free.pdfIn PDF document text
    • http://jujodixawo.rf.gd/11459280864.pdfIn PDF document text
    • http://xorabaza.rf.gd/fasimit.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_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 5040 bytes
SHA-256: e46eff3f60c8de42aeee08cf62e0c8a9ed7c2de45a7154b4beb276d95ab1d3d0
font_01_sfnt_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 10868 bytes
SHA-256: 1b9379c1913b16039f78ff14402f09f5bcf69121f37db5b48d1a1149ac589c7c

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