Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a9f06197e39933…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 19:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65bfcc4eb7272eb2f12c64873353a458 SHA-1: 808497b49c0056a2044204a7f1bc8c06f94c3036 SHA-256: b3a9f06197e39933e4d2efc00eb6209e0d1953be01051d72cc8fde7918435b60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm designed for deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/123?utm_term=sara+bareilles+i+choose+you+sheet+music PDF link annotation
    • http://kuvenumine.mygamesonline.org/how_do_you_pair_jbl_free_wireless_earbuds.pdfIn PDF document text
    • http://omynutural.space/84357639704t2vl0.pdfIn PDF document text
    • http://govnososal.xyz/47420436804ue233.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/tirijavixoru_neramanetuxo.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/vepuj.pdfIn PDF document text
    • http://italia-doc.fun/litapukudezojzo1e.pdfIn PDF document text
    • http://copyrightshelpcenter.com/lion_pictures_coloring_sheets4j3ri.pdfIn PDF document text
    • http://spindlndou.space/erector_spinae_plane_block_cpt_codesztxz.pdfIn PDF document text
    • http://reestr.site/gotekkhfa2.pdfIn PDF document text
    • http://bestita.space/how_to_perform_salat_istikhara_for_marriage5gh46.pdfIn PDF document text
    • http://urro-hu.com/263087182684emc0.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/the_power_of_positive_thinking_by_norman_vincent_peale_audiobook.pdfIn PDF document text
    • http://grenkasalo4.xyz/mojune40fyh.pdfIn PDF document text
    • http://naturalgood.space/zoxisukebuc7apj.pdfIn PDF document text
    • http://kapabifidi.sportsontheweb.net/clockwork_orange_book_online.pdfIn PDF document text
    • http://getbuiss.online/zoxasikokugen9c2bj.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/suraxuvuworivuxu.pdfIn PDF document text
    • http://opsnatur.fun/fikazipupesopavuvilut2v4.pdfIn PDF document text
    • http://help-violation.com/kawasokooz5e.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/1411a8e6-0afe-4f1c-ab92-78cec5c7a39a/the_firm_workout_hand_weights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede0b84e-2076-4a8a-9b52-654062084a1d/vexinividafu.pdfIn PDF document text
    • http://najijojovigom.myartsonline.com/74639001371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb77bd-9aed-4896-82aa-89c06df28107/best_non_programmable_thermostat_2020.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_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 5384 bytes
SHA-256: b112979b43ca16f4fba4799018362f156e23ebf0e8c87ca793f55a680f7a1d2c
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 11964 bytes
SHA-256: 7e9969cf83712ad3b5ed9607915dfcfafc82757d4a769b04af4d3c918848a757

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