Malicious PDF — malware analysis report

Static analysis result for SHA-256 186565ba13935db3…

MALICIOUS

PDF

48.7 KB Created: 2020-10-27 22:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c9079d0b4e83be856c0a0ec7b9757b99 SHA-1: de4fc4a3a675b815ef0d735f58e97bf1bd2fbef1 SHA-256: 186565ba13935db32286176a80e6ff2fba44bb15b20da3782b1fe7dbe8bb5d4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=big+idea+4+ap+biology In PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/wotubese.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/jedewadizuzogez_supoxatarisi_kisoxafonopetes_zesikerurug.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/riruruwixowexad.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4d5351fbb209c0.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/wojutud.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/xivugoriwaxikugu.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/votiserujinobix-tolasafej-vaxuf-tugubemajexed.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/lopasujagiposowaro.pdfIn PDF document text
    • https://veborikaja.weebly.com/uploads/1/3/4/3/134317734/xalijowoke_dinageg_vajesimebeniwi.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/3478814.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/felasorarabipis/blkoviny_chemie.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/berizimokuwel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6943/8622/files/xenupagotixul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1890/6531/files/dashboard_ui_design_for_android_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/lefedodanefadowomud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/basics_of_economics_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6835/8301/files/ain_soph_aur_mudvayne.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/47832558523.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/benefits_of_online_shopping.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/service_level_agreement_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/silvercrest_espresso_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/79407502526.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_off00008068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8068 5232 bytes
SHA-256: 45e80bb75fd25a3152ec2618bc74598a04082b6e05254716b0de5df33837423d
font_01_sfnt_off0000924f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924F 10212 bytes
SHA-256: 804a9a3a0e1441c1599abf6aa2a278775a317af5526205956feea910613c9f47

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