Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d159c43c2229b3c…

MALICIOUS

PDF

81.9 KB Created: 2021-02-12 20:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0273b67b34b4d360f716b3a19c8f160a SHA-1: bae3d70212401ff9bbce2a8283c07d90ab3faae0 SHA-256: 9d159c43c2229b3c318551cd23bb69dfbb3ab9195fa1cac3c2a91cb76cc01670
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one that appears to be a link farm for SEO purposes, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure itself are indicative of malicious activity.

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://baarspo.ru/wb?keyword=flipkart%20bed%20sheet%20cover PDF link annotation
    • https://cdn.sqhk.co/bonosexov/fmIUh2k/kiki_s_delivery_service_netflix_canada.pdfIn PDF document text
    • https://nasabera.weebly.com/uploads/1/3/4/4/134447265/eca40d.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/kqm0id8/19257175927.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/eGoMlH5/9596443274.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/682Co4J/62448062839.pdfIn PDF document text
    • http://taher-tcac.com/35575925928rc4gk.pdfIn PDF document text
    • http://samelike.site/aws_iam_role_policy_terraformq6y6s.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/pazewelotewabukovuso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zixadadafupeg.epizy.com/whatsapp_messenger_free_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/chronicles_of_narnia_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/xuvomok.pdfIn PDF document text
    • http://zemigubu.epizy.com/61286927093.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/video_er_website.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/wavubijekakijovadew.pdfIn PDF document text
    • http://wetowotupime.rf.gd/92957964405.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/59878433725.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/varasubuvamojuvofewasa.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_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 5380 bytes
SHA-256: b35a7fbb6acba64445e80e9dfdee16cc49bc253ddc707b9bdf89224f1e882ee7
font_01_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 10936 bytes
SHA-256: 1ab26f2b2c8387e39c8f0b2d2fd3eb7ddcdd96f6a5c24a8da4f666f80e785a61

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