Malicious PDF — malware analysis report

Static analysis result for SHA-256 802f69f203be5a54…

MALICIOUS

PDF

134.8 KB Created: 2021-05-19 17:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: af0432d0677c37e04b349de311f0a4ac SHA-1: 10e7ac7978681c999fde8593e81e8acf01a3e5cb SHA-256: 802f69f203be5a545299f991c5d796f1f470659c4bb93f75a29d55f46bab56a8
156 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of external links, many of which point to PDFs hosted on various cloud storage services, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://jottigo.ru/strik?utm_term=english+idioms+and+phrases+with+meanings+in+hindi+pdf', is suspicious and likely leads to a phishing or malware distribution site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://jottigo.ru/strik?utm_term=english+idioms+and+phrases+with+meanings+in+hindi+pdf PDF link annotation
    • https://mitapesazo.weebly.com/uploads/1/3/4/6/134652839/zelumapipapiwupema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5ff0925102b58.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/6713932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_6024622b484a5.pdfIn PDF document text
    • https://buwabasowo.weebly.com/uploads/1/3/4/3/134353515/nosisuvi_demodofirivon_wesamozamupizun.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/0c152.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/kegijaduxun.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/19497445107.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/30787315069.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/sewing_machine_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/how_to_become_an_elite_point_guard.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/potoru.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/h_s_c_result_2019_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/wetuluwidemaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/play_store_update_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/what_if_marvel_release_date_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/zizejodigapibosuzejalolew.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/bio_essence_snail_sheet_mask_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fc3126-1414-41da-9b36-7522cca47283/lizikareduje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d7b190-91c8-4a29-a9ca-318774534e47/sizedibob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20fd31d1-166c-454c-9d5e-9c87b306db30/turalokofitusazobida.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001d889.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D889 28432 bytes
SHA-256: ecf79b311e83bc6c64c69dbdbcc987569a244fbca742afeaabdb0d2841eb8c46
font_00_sfnt_off00015fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC7 7684 bytes
SHA-256: c78781f6a2371293ac2887f0305b4da0eb2555956a238e947739df36a316958e
font_01_sfnt_off000179bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179BF 5504 bytes
SHA-256: 13eb5627bc67606388a09bd2a57ba2e56aa44cfcd99d1cf622bb25405acab53e
font_02_sfnt_off00018c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C62 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_03_sfnt_off000197c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197C6 24452 bytes
SHA-256: 216b7959e2d29c94f5afb0eca28022632eb52c816cc88b31c4350767e9abceec