Malicious PDF — malware analysis report

Static analysis result for SHA-256 4371c6e9a42ae848…

MALICIOUS

PDF

83.5 KB Created: 2020-12-31 21:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: aa16106dc0cab2616f28664aec820745 SHA-1: e123c9897b97fc66e234fe48f3d21f0292530539 SHA-256: 4371c6e9a42ae848dc626dda6e959b4cabe197e9d3d59680ed6d16935e9491ad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme to malicious sites. The document body, though heavily obfuscated, contains keywords related to "real estate wholesaling" and mentions "wkhtmltopdf", indicating a potential lure for specific user interests.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=real+estate+wholesaling+bible+pdf PDF link annotation
    • https://batatebuve.weebly.com/uploads/1/3/4/6/134676181/9275661.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/lelazuxunaz_poxowat_waxojunevab_dubegezinir.pdfIn PDF document text
    • https://rolutadaneked.weebly.com/uploads/1/3/2/6/132681657/2484076.pdfIn PDF document text
    • https://pogabivapiz.weebly.com/uploads/1/3/4/3/134327153/6750245.pdfIn PDF document text
    • https://vizomitula.weebly.com/uploads/1/3/4/2/134266598/xanuwezipoduja_dutixakisefa_vobijoxeso.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/a5eba4baef7b02b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c91d15-9aaa-410a-915a-4d785b1d8146/in_the_bcg_matrix_the_dog_represents.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/valley_oak_property_management_modesto_modesto_ca_95350.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/nonparametric_statistical_inference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de16ba9-bd33-4412-ad39-650982f43add/origami_butterfly_tattoo.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/29952176677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b95c09-284a-4a0e-9cb1-b7a5b6c799cc/12425292772.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/asopalav_tree_information_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/usg_sheetrock_acoustical_sealant_submittal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f54c373c-fa03-47aa-8122-b700e3768466/61035354268.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_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 5448 bytes
SHA-256: a4859ec0561f1be09d7d11906a6d4cfb8d3e572cf1f7c7ebc494f09eeb191fd4
font_01_sfnt_off00011c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C53 10884 bytes
SHA-256: 4e0ab4757bb0d8965301d08104c7316bbc0eb3acf22201c151a6210c064c7c42

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