Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6639323b0c61912…

MALICIOUS

PDF

117.7 KB Created: 2021-01-08 15:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 84b447dd5fc9250fa8f93dcd8b46153d SHA-1: 2539aefcdc5e51e5d786b49c70498b3f0df628d2 SHA-256: a6639323b0c61912ad55d649dc2c14d4a2a6590c14dc152c0b1683414a9649be
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with the primary suspicious URL being https://trafftec.ru/aws?utm_term=alphabet+grec+ancien+pdf. This suggests the document's purpose is to redirect users to a network of linked pages, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/aws?utm_term=alphabet+grec+ancien+pdf PDF link annotation
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/faleloki.pdfIn PDF document text
    • https://kakijukiwobak.weebly.com/uploads/1/3/4/3/134322026/1d9f8cb4.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/didiajh/67295955584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_5fad5760bda04.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/ehjb4ia/53548070113.pdfIn PDF document text
    • https://ragurukenawuxif.weebly.com/uploads/1/3/4/6/134667210/voxid_letazijukimig.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/xic5xE8/50781489278.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/SeSA8LB/twist_hit_game_apk_download.pdfIn PDF document text
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/mumipikur-pikatupe.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/wazorixekunafob/party_planning_committee_agenda.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/jupananepulafiwugofem.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/81764740496.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/zuluwe.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13534 3120 bytes
SHA-256: 4925a81319bbd9efa0dcb9b7c66fccd1fd8c2b9f5e9916edfa1d670e4d491518
font_01_sfnt_off00014069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 5368 bytes
SHA-256: e3ad8c78f9d755d1ac154d662aa8f745a6383ef371c7747c327edc47338f6fb9
font_02_sfnt_off000152a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A6 32808 bytes
SHA-256: 655038f2aa7310c5fe57aff948581b6220276b8c69879b7e332afbead2f6840d
font_03_sfnt_off0001a141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A141 16388 bytes
SHA-256: 230867443676eb66e4137b9c5d58b1c45ff771c736da1a31e03781e2c1a2dbcf
font_04_sfnt_off0001b737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B737 6304 bytes
SHA-256: 23206a3809a93d7a65e30ceee041c4f68ea8060ae9465c6f64f0672d4aa8de18

Open this report in the interactive analyzer, or submit your own file for analysis.