Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42134c1c478802a…

MALICIOUS

PDF

119.4 KB Created: 2021-01-29 20:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6fa67d3ccd5bdcdc19be4f528adb7ab2 SHA-1: 78dce94aaadbf2009e236e24d7d581818006dd60 SHA-256: a42134c1c478802a1f8e442edaed55238a2e21921d3c826e36abe92d948f8c67
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, pointing to numerous external PDFs, one of which is `https://s3.amazonaws.com/kaxukok/53089035333.pdf`. Another heuristic indicates an external URI to `https://bologen.ru/123?utm_term=tv+guide+tyler+tx`. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=tv+guide+tyler+tx PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fd0b98c3d563.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/nepanaxow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378855/normal_5ff6b53943319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fe302ad23c84.pdfIn PDF document text
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/62e2ac9.pdfIn PDF document text
    • https://xopuwofotore.weebly.com/uploads/1/3/1/8/131871456/setufusawabegobuxalo.pdfIn PDF document text
    • https://rijopadanag.weebly.com/uploads/1/3/1/0/131070137/cec5402c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kaxukok/53089035333.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/comic_collector_guide_app.pdfIn PDF document text
    • http://lixumogal.epizy.com/emulator_android_for_pc_ram_1gb.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/difference_entre_cellule_vegetale_et_animale.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/buick_verano_manual_transmission_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/71730281973.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/cm_browser_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/movafesugedekigetilobeseb.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/android_architecture_components_tutorial_medium.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/bodies_by_rachel_28_day_shred.pdfIn PDF document text
    • http://nabiporemug.epizy.com/animation_throwdown_mod_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/2015_jeep_wrangler_manual_transmission_noise.pdfIn PDF document text
    • http://disukifas.epizy.com/zoduwemidelop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C59 4452 bytes
SHA-256: 3102a715bc42c5a8c0bdbc447f1e92c93c49b8428b92eb5a69e989632b86dd2a
font_01_sfnt_off00018b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B96 18116 bytes
SHA-256: 7dcdf85de3068e7b323d00e848b67450dd3dfd713fa13571de58b8513b4f223a
font_02_sfnt_off0001c1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1E5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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