Malicious PDF — malware analysis report

Static analysis result for SHA-256 b864e3f4cf6b0851…

MALICIOUS

PDF

119.5 KB Created: 2021-03-24 16:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da0b7af153e6418900343a8cfd402712 SHA-1: 8753bbaed0d1064701e9ae2d956abe8649eccbbc SHA-256: b864e3f4cf6b0851328a63c52263fe9743c73abdaf8ef1c2c33045bafbfcb9a1
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/wix?keyword=elective+affinities+definition PDF link annotation
    • https://nefufepaxesa.weebly.com/uploads/1/3/1/4/131453268/3843583cc.pdfIn PDF document text
    • https://tezanifarepuji.weebly.com/uploads/1/3/0/7/130775277/kalutata.pdfIn PDF document text
    • https://videxopefofima.weebly.com/uploads/1/3/4/1/134131768/gurikeruditum-gokofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471484/normal_60548c0f26c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_602243b256d1e.pdfIn PDF document text
    • https://vavaxurose.weebly.com/uploads/1/3/0/7/130775274/zefamulesinox-gazidazaliliro-dilupagorixe-batozodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_5ff3b2d6738b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fdfde840cf1a.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/towuperuxufixuz.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/wofaxil/perfil_stalker_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/jujuxatedogisova.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/23748777626.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/aviation_merit_badge_pamphlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e7e320-d53e-429d-8cca-7b9d5e1efbfa/fanoduxiratuxupep.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/vamimuref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95313d7f-40a5-4db1-8199-8d9bd30bae90/63646516347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d2e696-7a91-4f60-aee3-6dbce833acca/garmin_920xt_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62932994-97e9-4ebf-a3de-3e9762f0e058/how_to_get_a_learners_permit_in_maine.pdfIn PDF document text
    • http://fuzumonezipozut.epizy.com/baroputufiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d180ff7b-82bb-42b0-9f54-70f89c15236d/apache_shiro_is_dead.pdfIn PDF document text
    • http://mawesawikatunus.epizy.com/69694507320.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_off000195cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195CD 4936 bytes
SHA-256: 8f2edaa953f76860a24b02dfed87ba8ac26dff3087ddc6f10c4fe7cdc2ae9362
font_01_sfnt_off0001a6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6BD 12404 bytes
SHA-256: d38055d66689b4d39e9f6c7b2833578b380826d97677dfd679f2cce7ad819328

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