Malicious PDF — malware analysis report

Static analysis result for SHA-256 8116dc68fb8fa58a…

MALICIOUS

PDF

71.3 KB Created: 2021-02-22 05:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 61d804f5ee137af8fe23fb1d3c25c62f SHA-1: 541c7985b9a78f58e32a5ce39dc7ac9b8197ff4c SHA-256: 8116dc68fb8fa58a0bae041e6f1eb69525aa7b43c958c126beea23e2899e3929
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=pembina+gorge+campground PDF link annotation
    • http://negisalipividul.iblogger.org/baricco_libros.pdfIn PDF document text
    • http://martakkord.ru/baidu_antivirus_free_full_version_2019p129b.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/kakufetafobsfopy.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/metiralanirijipe.pdfIn PDF document text
    • http://myimperfectmomlife.com/xogirojesixemugujozela8tpby.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/gsS1cjd/the_walking_zombie_2_zombie.pdfIn PDF document text
    • http://love-cosmetics.shop/ronugufuguakzm.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/zasepo/kuxujomuduvoke.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/zudakilojigab.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/3193691635.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/mitavorukuzow.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/soul_train_awards_2011_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/sizenu.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/compound_words_worksheet_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/chuck_e_cheese_band_performing.pdfIn PDF document text
    • http://bikilut.epizy.com/convert_to_paint_file_for_free.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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 5324 bytes
SHA-256: 1d978e81ecb686ab3e90d91f7e107560dc4a381c46701db1e01b956b8211b3f7
font_01_sfnt_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10648 bytes
SHA-256: 3e0a46996806d5df7343a23d31184dd181d3dcaed08fbf68fb23b96160c7f265