Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f14caec33860dc3…

MALICIOUS

PDF

76.9 KB Created: 2021-03-02 22:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8713c74a3bf16ffb1c8ac4f2187f36a4 SHA-1: 9f5fd17fbe0e15795864a551ab12ccff638c30d5 SHA-256: 4f14caec33860dc3c7abcf021a6b3de956b792590ea5157e3526d33f08a8468b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/award?keyword=the+missing+piece+tampa PDF link annotation
    • http://dajexori.mypressonline.com/who_are_the_best_aa_speakers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459323/normal_5ff802a2d40df.pdfIn PDF document text
    • http://shlifovka-pol.website/xogogimorivutasizigojukz98.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/gefaxene-rexagixew-mibamugadifeg-dademevuliw.pdfIn PDF document text
    • http://opensoda.pro/ejercicios_y_problemas_de_porcentajes_1_esovi84z.pdfIn PDF document text
    • http://retamos.mygamesonline.org/kotor_walkthrough_tatooine.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/winchester_model_12_shotgun_owners_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5ff87fc2efdd7.pdfIn PDF document text
    • http://allmedbook.com/covid-_19_pandemic_utility_bill_assistancewyvwu.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/baxegezivumi/sky_movies_online_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/blackberry_z3_autoloader_10._3._2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/buy_rabbit_ears_tv_antenna.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/the_revenant_bear_scene_explained.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/92171625140.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/vitut.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/kozimixeferifevi.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/50622463896.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/89465697896.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_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 5168 bytes
SHA-256: 0901ddf7e814f97ad146a6241cd5650e110f5e33abff700bbb660b4c744bbc3d
font_01_sfnt_off00010163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 10896 bytes
SHA-256: 4bc7c8e3eaf648be2922ba8fe20ca400a757deb64e85cd380426161ce79b2690