Malicious PDF — malware analysis report

Static analysis result for SHA-256 615b196e7574c618…

MALICIOUS

PDF

95.0 KB Created: 2021-03-23 23:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6a29db591614ac70f87e2306ff81338 SHA-1: 35131dd336515f7b1485dc347fc507a632fbcb3c SHA-256: 615b196e7574c618f5a81c6cba749957b7ff66c48f487e119ee956eeecefdd5e
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on free platforms like Weebly and Epizy. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=ranger+spells+xanathar%2527s+guide
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/pozofotuniroxunubix.pdf
    • https://cdn.sqhk.co/pijajawopoji/jdAqhi8/big_nick_s_sports_cards.pdf
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/majaxotimif_jivaxul_zakuj.pdf
    • https://cdn.sqhk.co/vemegunir/b7ghijg/robot_vs_zombies_attack_mod_apk_unlimited_money.pdf
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/513016.pdf
    • https://cdn.sqhk.co/tamupoto/hbvhljg/78689701325.pdf
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fc63b1a8ee00.pdf
    • https://cdn-cms.f-static.net/uploads/4404290/normal_6038c36232173.pdf
    • https://cdn.sqhk.co/dikizumi/biejjh2/big_vesta_font_free.pdf
    • https://cdn-cms.f-static.net/uploads/4426267/normal_6021bec5ccade.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_603f0607ef5c1.pdf
    • http://xinasud.iblogger.org/24557589586.pdf
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5ff67723a84a1.pdf
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/gazukuzidinow.pdf
    • https://cdn.sqhk.co/fiduzosi/ijHNCwJ/general_sniper_lolpedia.pdf
    • https://nazoxuja.weebly.com/uploads/1/3/2/8/132814973/xenoja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gawibij.epizy.com/electrolytes_for_electrochemical_supercapacitors.pdf
    • https://uploads.strikinglycdn.com/files/479832e5-2e90-42aa-90b4-6abad7d8cfbc/rezuxabokijopokifolo.pdf
    • https://uploads.strikinglycdn.com/files/a9b0f316-ffdc-4589-8241-ec1026458bd3/scooter_flat_tire_repair_near_me.pdf
    • https://uploads.strikinglycdn.com/files/88b1302c-dda3-4127-8914-a5d39fac6e0b/volozetimopel.pdf
    • https://uploads.strikinglycdn.com/files/c1814d7f-d80a-448e-a5b5-28a8dbcc54e4/56488769522.pdf
    • http://fosekor.epizy.com/bytearrayoutputstream_example.pdf
    • https://uploads.strikinglycdn.com/files/022e6cab-f067-4dcf-b15f-0aefee9c9e19/how_to_resolve_conflict_in_nursing.pdf
    • https://uploads.strikinglycdn.com/files/1d4c0d2d-8dca-4cc2-a364-5f581bf1fd08/my_not_so_perfect_life_quotes.pdf
    • https://uploads.strikinglycdn.com/files/bae25150-2329-42e9-a764-703ee89fb542/are_wii_games_still_available.pdf
    • https://uploads.strikinglycdn.com/files/27477ce8-19f8-4772-a37d-f06423fd4389/successful_coaching_4th_edition_chapter_2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012955.bin
16dbf8e2f8991066d1cc29ac780e888351a8eb6669aedfcc60b271d709f959c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12955 5104 bytes
font_01_sfnt_off00013aaf.bin
ce8e0f2d00a350890f5885b4f72668bd136a575513f4e7cbeaead75eedcac7c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAF 11060 bytes
font_02_sfnt_off00016071.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x16071 4324 bytes