Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabb18867822b35a…

MALICIOUS

PDF

66.2 KB Created: 2021-05-28 02:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5ab7631558244fdddad67c6b68c23833 SHA-1: 8cad8de23fd37b7a7f5e63b40481246515b8e8a9 SHA-256: dabb18867822b35a4058b70d38f6621d07ec14c11516b8e658271dd785bf0174
214 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=can+you+really+make+money+on+plinko+master In PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/tuded_mopasil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_601de8f1ed455.pdfIn PDF document text
    • https://kelukija.weebly.com/uploads/1/3/4/3/134337818/gusagotakelozigod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_602f83db48155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5fcd64-8ee2-4d46-84cb-c77e1e1bd28d/marvel_movies_in_sequence_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd76e001-1b74-4356-b1ff-305176b0709a/4_types_of_organizational_structure_in_healthcare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc5a285-c1ea-40b2-91de-213c342a934c/sopa_de_letras_con_sinonimos_y_antonimos_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad62b86c-08c7-4329-8f30-f5c77d885b85/7054529337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a10cd8-7409-4744-a793-0f20af7c3af7/how_to_cut_calorie_diet_plan_a_500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1869d3-80b2-4dfc-9b60-cc038fba6fb3/dozodetujidusopata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d012215-ca87-4709-adca-39388409c511/xalewimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1873a69-cb16-4ace-a2fa-67614811f127/carbs_in_taco_bell_soft_taco_supreme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b206ff7-80f1-453f-bba3-b1f13811c5f0/yalsa_graphic_novels_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1615ecfe-3b6e-4077-973b-49d7a8f2a490/i_want_more_than_anything_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70457048-302e-49dc-9246-53b25af6802f/fetevuvewuporaxezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb70b06-295f-456e-bceb-7ef6f4de6900/wiwogetutofowevamadexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee08b28-5cfc-43c4-8ca1-59e48b2c063a/eye_of_the_world_wheel_of_time_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969fb13d-cff7-4ed1-99a1-37541998704c/fobidov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0790d20b-8ae1-4ed6-bc70-722525d97ade/burger_king_menu_deals_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2201b3a-922e-4614-a1b3-9aaedb8bc550/how_to_pair_microsoft_bluetooth_keyboard_800.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_off0000c858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC858 5036 bytes
SHA-256: 42d7ec5a0e38fe96650ee4a16284b3ca00fbad3ea6669f8e58bee84b6f3e333b
font_01_sfnt_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 9588 bytes
SHA-256: 6fde735b0a116c628f15719dbc54d4721ef31188f9b143bb6ddc4a0496c3f720