Malicious PDF — malware analysis report

Static analysis result for SHA-256 7030a2654c549c40…

MALICIOUS

PDF

88.0 KB Created: 2021-03-14 20:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 860387959650fe23ac27bc4a18f5b29e SHA-1: e2cdaea5e605a4842f462517268cc3ca6482d318 SHA-256: 7030a2654c549c4068c1622a54983b6a21159d8e69480dfee3e897c51761c3d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, which is indicative of a link farm or SEO abuse. One of the primary external links, https://crophysi.ru/wix?keyword=ares+virus+mod+apk+1.0.7+unlimited+money, suggests a lure related to downloading an application. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crophysi.ru/wix?keyword=ares+virus+mod+apk+1.0.7+unlimited+money PDF link annotation
    • http://lololoj.sportsontheweb.net/50976258057.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/xarudeber.pdfIn PDF document text
    • http://stroy-level.ru/84975499420bay2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_602a0deb5a96a.pdfIn PDF document text
    • http://lynciguest.com/monster_island_buddies_episode_120a20b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_604cbd4ad7596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fd320e23f81e.pdfIn PDF document text
    • http://info-pages.ru/vasedanupubiresurugidikebyd3ac.pdfIn PDF document text
    • http://mini-camera-super.club/dream_dictionary_tony_crispegpnc.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/radubozufiwo/zumuxuxonovew.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/41373159238.pdfIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_4559aeaec237420b846b65f28a7fd27d.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_e82d5e2558a246c1b2c14f4faf02ccbb.pdf?index=trueIn PDF document text
    • http://zudupaxub.myartsonline.com/fezegemapos.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_f5a73da718674c7fbf7575a001724bbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/33219765183.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/video_calling_app_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/python_datetime_parse_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/19912978455.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/warejonotanepib.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_24b613c09b394a53b5599e3be470545a.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_6aaa4f5ce230471cb222d49569009c59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/36772994254.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 5628 bytes
SHA-256: ab6c7e7a231768a9f5b1cd27fc9b5a36a14dc226ad2c61d1fa7a95aef2d1ce42
font_02_sfnt_off000112ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AD 12776 bytes
SHA-256: 454fb01be72cd6d0c957eb20051d829f71dcb242eddae8c79cf044522f947237
font_03_sfnt_off00013b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B46 16060 bytes
SHA-256: bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d