Malicious PDF — malware analysis report

Static analysis result for SHA-256 529a1208ac090c6c…

MALICIOUS

PDF

74.0 KB Created: 2021-05-18 02:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 066123f40d78a22b20b4bfdc80594593 SHA-1: bfa6767aa9b973a6008fc3a56baf026df3871c7a SHA-256: 529a1208ac090c6c49610401c9aaa6214d99e3f5950d0553f115801693c48dae
156 Risk Score

Malware Insights

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

The PDF contains an embedded URI that points to a URL designed to mimic search results, likely as a lure. The PDF also contains a large number of external links, characteristic of SEO spam or link farms, which are often used to distribute malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wb?keyword=ba%20ii%20plus%20online%20calculator%20download%20mac PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5ff5c98dbca7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374198/normal_5fee7d6aa860f.pdfIn PDF document text
    • https://rudoliretumuw.weebly.com/uploads/1/3/4/8/134861944/591676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481834/normal_5fe3e0572a490.pdfIn PDF document text
    • https://kutebebi.weebly.com/uploads/1/3/4/5/134528954/8a73972b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_602a00e64e8ab.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/46186872667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_603822181a3a0.pdfIn PDF document text
    • https://viwajojavejad.weebly.com/uploads/1/3/1/8/131858172/fee67d2f3927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5fc647d3f0bc1.pdfIn PDF document text
    • https://nurerimufiwovu.weebly.com/uploads/1/3/4/3/134394752/c0234396da4945b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_604aade173d8d.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/desenaz/bail_application_format_under_section_307.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/wasabavefefanax.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/5086570729.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/what_colour_is_the_evaporation_line_on_a_pregnancy_test.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/60172862773.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/hp_laserjet_p1006_printer_driver_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/zanidubibo.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/guzapogiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/5906721485.pdfIn PDF document text
    • http://nonosolagosev.epizy.com/reconnatre_et_communiquer_avec_ses_guides.pdfIn PDF document text
    • http://bujoraz.rf.gd/abdomen_exercise.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_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 5360 bytes
SHA-256: 7f0c5d6a9351ea51316db31a9d3987d282641b8566190a209a3eb631df78f4d3
font_01_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 10220 bytes
SHA-256: 63b88b507bd3e0f7c402917edc0bd29a3a25b559f1a228054be4ec0aba6b7ac9

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