Malicious PDF — malware analysis report

Static analysis result for SHA-256 47932be7be656711…

MALICIOUS

PDF

44.9 KB Created: 2020-10-25 10:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 90fe913d1b7269f9be77439514447aba SHA-1: 1deab33a814e94095608c690c2730afd077bc7bb SHA-256: 47932be7be656711e4e06d08527f35cad9e0f2cda2317b7b477c87906abbd9f9
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one that redirects to a URL suggesting a 'call spoofer mod apk download'. This, combined with the PDF being flagged as a malicious redirector and link farm, indicates an attempt to trick the user into downloading potentially harmful software. The ML classifier also strongly indicated maliciousness.

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://ttraff.link/123?keyword=call+spoofer+mod+apk+download In PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/sipudewosijudiv_mexirelotiwama.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/dumirisefamul.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/1139483.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3297565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8aaf06216de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f86f5ffaddeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_5f93327439942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/evolution_of_operations_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5245/6346/files/lord_of_the_flies_allegory_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/impressora_hp_deskjet_2546_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/dotageruva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/05_polaris_predator_90_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/nerewasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3110/1092/files/alex_morgan_jersey_youth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/laveruwizakimupidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8884/5210/files/cv_maker_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5608/9256/files/kusapabipotulilamufeziw.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/pezowudizar.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mujawar.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/rasod.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/volonelibijilek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBB 5248 bytes
SHA-256: b15687478622c1457c46e76b70d963c5f5821e2a6a602631cac7e2e2c588a8a3
font_01_sfnt_off00006d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 10112 bytes
SHA-256: 25f4dc05399d67db1eb5d409a238e3e4f1f8adbd341d9f6c8dd14a986267ea8b
font_02_sfnt_off00009066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9066 16144 bytes
SHA-256: c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b

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