Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae620d5ef0ecb65…

MALICIOUS

PDF

84.7 KB Created: 2021-05-23 06:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a85ad49b6e2c894427a4d9aa0b120d1b SHA-1: 57d43eed04f594f9b7c38c4cd6318a5643c0f6d6 SHA-256: dae620d5ef0ecb65595245375596d2427c0fc8c24c597e900447be89e85f8c1a
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and by a machine learning model as malicious. It contains a large number of external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection also confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.
  • 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/strik?utm_term=mahabharat+serial+star+plus+song+download+mr+jatt PDF link annotation
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/paguwajigukix-lujovufudilo-wotowesepebujax-binatobeganomux.pdfIn PDF document text
    • https://tidevaxapoled.weebly.com/uploads/1/3/5/9/135971763/mobaxalegen-sumisu-nefexugumot-vexuzetosap.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/5549589.pdfIn PDF document text
    • https://zufunukilaje.weebly.com/uploads/1/3/4/8/134888690/0f9021687c4fe.pdfIn PDF document text
    • https://wixolovab.weebly.com/uploads/1/3/0/7/130776385/futarobudejureral.pdfIn PDF document text
    • https://fixumimudojuzu.weebly.com/uploads/1/3/4/6/134607797/kosujawiz_mesobowexa.pdfIn PDF document text
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/dagiv.pdfIn PDF document text
    • https://zojubexetiw.weebly.com/uploads/1/3/5/3/135316795/sasepenukojew.pdfIn PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/muvodajolitujuzutogo.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/55f68.pdfIn PDF document text
    • https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/3209c55d78fc0.pdfIn PDF document text
    • https://narezivif.weebly.com/uploads/1/3/5/3/135307162/wavibi_vigora_jijumu.pdfIn PDF document text
    • https://jemusutagutuf.weebly.com/uploads/1/3/5/3/135390091/9015741.pdfIn PDF document text
    • https://nijusalelazi.weebly.com/uploads/1/3/4/8/134875584/1722492.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/1866c36bd20228.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead5735a-b77d-4822-ba4d-1b7ec3cffde8/how_to_write_a_character_analysis_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/how_do_i_get_into_facebook_marketplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb23f8e-8f4f-4924-aeb4-dff2610736a0/how_do_i_change_the_battery_in_my_genie_intellicode_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bfe13f-04a4-4449-9aaa-2690ab3e80ca/lomoganovagido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba41a7ed-9dfd-47a9-8a8f-92e8370c24c7/their_eyes_were_watching_god_chapter_6-10_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0bbaf6-627b-4ada-9d8a-a8516b1d8aa2/what_is_the_plot_of_the_cask_of_amontillado.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/lakeside_school_derby_ofsted_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e9ea22-1ec2-48fa-ade0-0a751b9c1469/4_stages_of_embryonic_development_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3573b1cf-e2ff-4e08-b873-80fb87edb84d/dejagelofaxij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b02649-83cd-417c-b49b-9e6044ef5554/lonolilodomamupevori.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/anastasia_beverly_hills_dipbrow_pomade_color_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/lonely_planet_moscow.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_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 5688 bytes
SHA-256: 52d1dadf7807dd3ac0ccc1ca6c39cb92fed1f7d8be5bded6359112324eb64d11
font_01_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 10780 bytes
SHA-256: 792d1741a442680cb150bc864435729f2a5c6363631b780e0ac9eb0aea55fcfc
font_02_sfnt_off0001337b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337B 4404 bytes
SHA-256: 22cab528f6cb4982ab50794c858316567b52da5442fa7ee1ae67752c4c040622