Malicious PDF — malware analysis report

Static analysis result for SHA-256 7268a4d511b76cc0…

MALICIOUS

PDF

67.6 KB Created: 2021-03-25 03:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0601c32c93b2584b80f9132713022953 SHA-1: 2d7f2c978eeb443e396eb604ab9ea08b793f0945 SHA-256: 7268a4d511b76cc0b1bdfda9489f4f5ace79055e302db57179fa80f990ae34bd
252 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious infrastructure, including an SEO redirector. The heuristic firings indicate that this PDF is designed as a malicious redirector and part of a link farm, likely for phishing or malware distribution. The presence of obfuscated content and the ML classifier's high score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7003

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=sony+ps+lx300usb+belt In PDF document text
    • http://pixubak.iblogger.org/588330221.pdfIn PDF document text
    • http://fortuneo.biz/jasperreport_java_tutoriallgux2.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/Pji0Vhf/3d_tuning_download_windows_10.pdfIn PDF document text
    • http://healthit.space/212827993514me70.pdfIn PDF document text
    • http://organic-ita.space/estrategias_definicionbq77x.pdfIn PDF document text
    • http://xazivigufimu.22web.org/bodoni_72_smallcaps_book_font.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/gdFhfwt/vuboduboziliwowop.pdfIn PDF document text
    • http://dewiluvafaridi.22web.org/zujalobonakewituwera.pdfIn PDF document text
    • https://guzorinimalagaw.weebly.com/uploads/1/3/1/3/131381991/6de2f0ed47958a.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/hjhpidJ/dupabomulikamanimewaso.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/b0WBigN/coloring_games_for_adults_free_online.pdfIn PDF document text
    • https://nibivesulekot.weebly.com/uploads/1/3/4/0/134017222/b7a54.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/fevobelijogal/emergency_medicine_clinical_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/limoxesuses.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/nagdev_bhojpuri_movie_link.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/kepupu.pdfIn PDF document text
    • http://nutimuratibuzur.epizy.com/has-_bled_score_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/7725952002.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/canon_speedlite_430ex_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/bedsheets_online_shopping_india.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/welanuzavede.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/one_way_anova_manual_computation.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/first_aid_kit_checklist_template_excel.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 5228 bytes
SHA-256: 75f622580e81c7c4a6a666603badebc8976fda4cd5b0b196d35c15eb55fead98

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