Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5086f88b63ec07…

MALICIOUS

PDF

35.0 KB Created: 2020-11-02 07:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 492eaaf6a5d7198e8bc1b46f7d79aacc SHA-1: caa5bb045fc5b79282159947600009a180e9ed81 SHA-256: ed5086f88b63ec07db55bf4de7902f0e8e5a4258bdceb236b84c8935b16c45e7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a 'girl scout cookies 2019 order form pdf'. This heuristic, combined with the ML classifier, strongly suggests a phishing or redirection attack. The document body and embedded URLs indicate a pattern of linking to various PDF files, likely to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=girl+scout+cookies+2019+order+form+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f8e7fd5ab29b.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/leguvefu/calendario_escolar_2018_y_2019_sep_195_dias.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/boktai_the_sun_is_in_your_hand_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/bad_moon_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/43350593439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1375/5832/files/words_that_start_with_ali.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/95082238137.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/neteboxopibadudopojowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1380/5512/files/venevelifilavebuxez.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bystronic_press_brake_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1351/9511/files/cuisinart_food_processor_manual_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/22942978032.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_off000048c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C9 5668 bytes
SHA-256: d2a4faad52f057602c5435c88da6b198806839210bb153d839ef8bce4ac292db
font_01_sfnt_off00005c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0C 10228 bytes
SHA-256: 507b048217202305ef47b68d849e83cf31a55151252f22e877c159e73f195c7c

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