Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1617a4b318d55c…

MALICIOUS

PDF

89.1 KB Created: 2021-04-05 12:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bdc28c7f239d61309a952d71df5b8177 SHA-1: 05109120b8fc22463f92086ace367474eff52123 SHA-256: ad1617a4b318d55c4690674e10ca1ebb6742d7cd72ee83c7af56b9c57b3893d4
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The document body, though partially corrupted, suggests a lure related to setting a watch time, which redirects to a suspicious URL. The presence of external URIs and the overall structure point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+to+set+the+time+on+my+citizen+eco+drive PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5ffd219044a83.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/gfYJiiv/rarity_nails_coupon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fda4a888f324.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/XijczSV/new_bhojpuri_song_2019_bol_bam.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/ahgSfDX/ballout_baby_i_been_ballin_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_60385d6ecfd8c.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/iejfNif/time_travel_movies_on_netflix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418557/normal_6006a029cf1ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_6023d827b8bd1.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/bidjahj/wowuxefekejizedipujenar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gesulobanaxa.rf.gd/business_partnership_models.pdfIn PDF document text
    • http://torogita.rf.gd/windows_7_iso_direct.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/64478316208.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/bidavatizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37040a2d-f191-4f78-8e7a-119053d9df10/holmes_and_rahe_stress_scale_test_online.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_69a2ac2c594a4a9c9422ff9d6e8377fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/ielts_writing_task_2_band_9_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/my_sticker_maker_apk.pdfIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_25a4468c3c7f402abe359811d23080bc.pdf?index=trueIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_d71c4276ef7141d8bedee0d4b425c5ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6197847e-a0c5-442e-8e69-344cefa00d2a/pubavime.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_ad7b6ed678d04457a5064482608db916.pdf?index=trueIn 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_off00011a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A13 5204 bytes
SHA-256: 5fd873c855fe07df55a48a0159465914634665b221b10f63d3bacc6dfdb98ff6
font_01_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 12428 bytes
SHA-256: c4caafd61bae8f2e5c31ee39884359e2c345a017354cc893ed03cb2b69c82f6a

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