Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7614153e06bf9f…

MALICIOUS

PDF

81.4 KB Created: 2021-03-25 06:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 40b52b361a9e37c207b23dfa864b625b SHA-1: aa531655409f3c24693ca7ad17d588e108f78827 SHA-256: 9e7614153e06bf9fdddd0922a242ab58befd066163e0b159e84f536a11d38e72
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/123?utm_term=flight+pilot+simulator+mod+apk+offline PDF link annotation
    • http://getcreditreport.info/junukenegafutow5bmkn.pdfIn PDF document text
    • http://swiss-family.space/729355564281md2d.pdfIn PDF document text
    • http://demegudatodura.iblogger.org/cuisinart_dcc_3200_review.pdfIn PDF document text
    • https://zigulowowe.weebly.com/uploads/1/3/1/3/131380415/8201448.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/4753448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_6034284b325b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5fe76ee793f7b.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/9a1a5033e1aab4.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/bengali_to_english_dictionary_download.pdfIn PDF document text
    • http://kuxemanes.medianewsonline.com/agronomy_in_telugu.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/dunagutaditapabal.pdfIn PDF document text
    • http://hookup668.site/heparin_bridging_guidelinesn6pdh.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
    • http://zozafiromilofin.epizy.com/bts_fake_love_video_song_free.pdfIn PDF document text
    • http://nabafutig.myartsonline.com/bozutopakoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c64404-831e-444b-b22a-3b09041ea128/how_to_read_variance_inflation_factors_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cafe33c-588a-4013-a30f-1f5c2c4b8acb/como_eliminar_un_archivo_autorun.inf_de_mi_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbecfb6-4035-4116-81a0-ff6cb5fc8a30/87560169455.pdfIn PDF document text
    • http://pofavokazaf.rf.gd/ferula_asafoetida_traditional_uses_and_pharmacological_activity.pdfIn PDF document text
    • http://likadekax.rf.gd/17552642535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51166203-51e0-469a-bb92-d0860fe23f8e/columbia_tn_newspaper_classifieds.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_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 5356 bytes
SHA-256: 03236ee4320f2657eb5a250a6ff84e186eca794b520eb3cfa69a24bb49f7b7fd
font_01_sfnt_off000104cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CC 10848 bytes
SHA-256: afc920e185350911c9c3e6db0781e01b49606f6b61f1e86871efc5145e6b668e
font_02_sfnt_off00012a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A01 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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