Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7444a25cb073036…

MALICIOUS

PDF

77.6 KB Created: 2021-02-24 05:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 31b3e4e17d37fe98d307959c3e8fa442 SHA-1: c6d9c152d880349dc72bd950a3ca8002d70ead00 SHA-256: c7444a25cb073036613ac50ccda8b4ffd537c4977176c2581e8a454691511baa
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal a significant number of external links, including a link farm and redirectors, suggesting an attempt to direct users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/strik?utm_term=silver+eyeshadow+stick PDF link annotation
    • https://zapedumukovig.weebly.com/uploads/1/3/0/7/130775012/6225498.pdfIn PDF document text
    • http://cmbespaceclient.xyz/harry_potter_libros_originales_tapa_durapw5fa.pdfIn PDF document text
    • https://riwobasafogad.weebly.com/uploads/1/3/3/9/133999818/2418483.pdfIn PDF document text
    • http://insta-sale.site/baca_light_novel_konosuba_bahasa_indonesia_volume_17qs2q5.pdfIn PDF document text
    • http://coolstudent.space/maytag_neptune_washer_mah5500bww_bearing_replacement_kit8j68u.pdfIn PDF document text
    • http://ladyso.ru/42991501980i65z0.pdfIn PDF document text
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/0c150b8755.pdfIn PDF document text
    • https://panejukirid.weebly.com/uploads/1/3/1/6/131606092/4437869.pdfIn PDF document text
    • http://montana-media.com/wagagovegiromabokez7bpmp.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/vidadaviwal/statistics_and_probability_letters_latex_template.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/53425803575.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/15142160951.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/69415627263.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/93255499157.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/10088507848.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/alphabet_grec.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5132 bytes
SHA-256: 885fa65a9cc482c6603d2ba5ff5868d650d5d585040d742324c9d7520ed58344
font_01_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 10892 bytes
SHA-256: aa71e8a483fe2664291c0f8a19bb76998db756ea22e9dc768777046a822a2aa1
font_02_sfnt_off00011b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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