Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebafc48cf3662691…

MALICIOUS

PDF

73.4 KB Created: 2021-02-15 05:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 48ee5ac80920236f6b550cb96b57f9d5 SHA-1: 49763a51e769ce296e290e6ef53dd7c095542f2b SHA-256: ebafc48cf36626914ea1e6bd20bc69b9beb0c89e2842c4807896788f952988ac
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/123?utm_term=descriptive+words+that+start+with+s+for+a+person In PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/7386383.pdfIn PDF document text
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/7346205.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/1wsJjf6/merriam_webster_english_dictionary_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/jcagcji/who_is_the_killer_episode_1_puzzle_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/XMbGChg/75543921831.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/OmijNA6/a_street_cat_s_tale_simon_sparkle.pdfIn PDF document text
    • https://cdn.sqhk.co/baponakazu/5tlcuig/26368028630.pdfIn PDF document text
    • https://wabuxopimigom.weebly.com/uploads/1/3/4/0/134042903/2757120.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/VfH8hba/rebuilding_paradise_documentary_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/maxolavoweje/igjirjc/zoom_cloud_meetings_vs_zoom_for_intune.pdfIn PDF document text
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/6616759.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/wixatax/43176375639.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/spelling_test_for_ssc_cgl.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/83701006025.pdfIn PDF document text
    • http://jilutuve.rf.gd/wagobaz.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_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 5364 bytes
SHA-256: 97377f64c8c7d201d377ef76f1737befee0a253df2dc1d73bb7116ef22899e4f
font_01_sfnt_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 10124 bytes
SHA-256: b606faec1b7c3bab290da77a4bfc380793436801ae0ec3a55baddff4e3b04ff2

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