Malicious PDF — malware analysis report

Static analysis result for SHA-256 769a080d0ab1ac13…

MALICIOUS

PDF

70.1 KB Created: 2021-03-15 11:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e9dd5b4035b538a2ba9b3210307f7150 SHA-1: 3c5516e32d94c2efe5a2466a59fc907bc189ae85 SHA-256: 769a080d0ab1ac136b7b9a9dd53469ae8dbf2f23d5d0faad7be29ca756f919a6
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the phishing detection indicate a likely attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=unblocked+66+sprinter PDF link annotation
    • https://mitivowa.weebly.com/uploads/1/3/1/6/131607237/1031931.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/pezavixoden.pdfIn PDF document text
    • http://reduslim-buy.site/warrior_cats_clans_divided_free_download9ixck.pdfIn PDF document text
    • http://vukosam.22web.org/haryana_ssc_group_d_answer_key.pdfIn PDF document text
    • http://devivitonewe.sportsontheweb.net/52487153567.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/wepisimitigi.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/stuart_hall_representation_bookcgagi.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/5984109.pdfIn PDF document text
    • http://bexabif.22web.org/88226101977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/musokejixami/how_to_pick_a_master_lock_with_a_lock_pick_set.pdfIn PDF document text
    • http://sovuberexizizir.epizy.com/mckinsey_diversity_report_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad57380d-9af6-4be9-9490-c3c97a9adb56/nelilezolevizosifuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/93921972027.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/bncc_do_ensino_fundamental_em.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/tb_guideline_ethiopia_2018.pdfIn PDF document text
    • http://robexede.rf.gd/brake_technology_handbook_breuer.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/christchurch_earthquake_news_report.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/will_there_be_a_captain_underpants_movie_sequel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418171be-63ac-4f9c-8ef9-c1b84e0c60e1/how_to_put_a_brim_on_a_crochet_hat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4afb5c1-6376-49b0-9185-fe14a180d688/jipobipanikuzoku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC823 4992 bytes
SHA-256: 5160ef995333f54385c323701f3af1243f22af4936620f993b48cccbbb0bfd52
font_01_sfnt_off0000d920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD920 10108 bytes
SHA-256: 7b4460a0ff83106ec4714f0fc2d0814b603b75fc632940150ab9078174285458
font_02_sfnt_off0000fbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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