Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde5266b5d09ed47…

MALICIOUS

PDF

53.2 KB Created: 2020-11-03 00:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ad711d93ec119bae9e301ec0e612667f SHA-1: e9df7273d2ed10a651e3db4b302b02b452c58995 SHA-256: fde5266b5d09ed4770cd94023b1b3405794a5f0e6b60b6778ff319839d1d7d36
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains URLs that are also flagged as potentially malicious. This suggests the primary purpose is to lure users to external sites for further compromise.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?keyword=manual+push+lawn+mower In PDF document text
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/lukagidezujaxosudal.pdfIn PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/9858184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f9c354da005a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8bf53610bf7.pdfIn PDF document text
    • https://jaxebenub.weebly.com/uploads/1/3/4/2/134266064/wovatufunobuf_musarepakowop.pdfIn PDF document text
    • https://notupazepikinis.weebly.com/uploads/1/3/4/3/134382888/rakidixobamew.pdfIn PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/ludugewa.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/lebiruzu-tefam-vudatakit-nofixokuv.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/fasanag/17028609971.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/86500422841.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/i-_stat_handheld_blood_analyzer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3996/3325/files/upsc_prelims_2020_question_paper_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/wack_ur_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/saxufebaj.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_off00009210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 5156 bytes
SHA-256: 0133760943d32601b9ab9c789c33babaefff3923ae429d5774da477dac5a77d6
font_01_sfnt_off0000a38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA38C 10808 bytes
SHA-256: c75c9b464c8e0cdcb3136946d987d97fda65b93ee3270fa435690863f40f1485

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