Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1415dab61776af5…

MALICIOUS

PDF

77.7 KB Created: 2021-03-06 15:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d762d3cc9041df59ecd1d8bc4fd5de18 SHA-1: 7aa66ffdbbcf5d8f0654c1d8764934a482ecbc5a SHA-256: b1415dab61776af509017ec54a6d799ee0103c23d5dac7dd073dd770a94df389
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and Weebly-hosted files, indicative of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this. The embedded URLs, such as 'https://jottigo.ru/award?keyword=elsword+error+update+gameguard+110', are likely used to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/award?keyword=elsword+error+update+gameguard+110 PDF link annotation
    • https://luvalebasewe.weebly.com/uploads/1/3/5/3/135326782/b9d96997c07.pdfIn PDF document text
    • http://yatvoyya.fun/google_chrome_64_bit_offline_kuyhaa7lskg.pdfIn PDF document text
    • https://bogogumufen.weebly.com/uploads/1/3/4/0/134018830/varoveragapaga.pdfIn PDF document text
    • http://donbetosstreettacos.com/bomabobuxutoxotexaxhaeo.pdfIn PDF document text
    • http://jipujitematane.iblogger.org/top_app_sites.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_60212b89c2eef.pdfIn PDF document text
    • http://avit0.pro/vagerobakelorovxze.pdfIn PDF document text
    • https://jalizirut.weebly.com/uploads/1/3/5/3/135308553/feweruk-pikegit.pdfIn PDF document text
    • https://dijekoko.weebly.com/uploads/1/3/5/3/135315120/1385569.pdfIn PDF document text
    • http://kengoru.space/human_anatomy_and_physiology_10th_edition_by_elaine_marieboh6zp.pdfIn PDF document text
    • http://avtovishki-msk.ru/sikejoniderowatuworps78h.pdfIn PDF document text
    • http://podarokinsta365.site/codewarrior_64_bits_freef1aob.pdfIn PDF document text
    • http://itclick.pro/mi_amigo_jesus_cancion_catolica_letrabr41s.pdfIn PDF document text
    • http://rukozhop-guide.com/blink_xt2_owners_manualt1x5o.pdfIn PDF document text
    • http://zopesudi.iblogger.org/menciona_los_pasos_del_proceso_de_la_investigacin_social_brainly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_601a873ccccca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_601f316d94bfa.pdfIn PDF document text
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/d5a6af1455c2e.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/jagux/informacion_de_los_alimentos_transgenicos_a_favor.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/xumabem.pdfIn PDF document text
    • http://kirutitas.epizy.com/zutezuweremalun.pdfIn PDF document text
    • http://dapobepopid.rf.gd/marvel_super_heroes_wallpaper_hd.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_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 5252 bytes
SHA-256: 2e64d935c01f3ae27a3f79c7e5a3de43f6c0e0d12d54ef57c47aa98cc2a55ab3
font_01_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 10548 bytes
SHA-256: b1fd022d2d47b628602dfc677144f9ab365c9dac2cdb7662f7ac8d49011317e4
font_02_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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