Malicious PDF — malware analysis report

Static analysis result for SHA-256 62922c0f709c60bc…

MALICIOUS

PDF

95.9 KB Created: 2021-04-23 05:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c80acefb794b2326ae07b9b86fd25e4c SHA-1: 9669779a9c1e608fa40c3f61de8cdabccf2777ed SHA-256: 62922c0f709c60bcd90483fdee909cbdec48d7feb06de167758b917402e94b37
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=nato+phonetic+alphabet+quizlet PDF link annotation
    • https://cdn.sqhk.co/lebogomatoze/jbHAjfr/anime_gif_live_wallpaper_2_pro.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/76756784939.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/ichQgcN/tubareniviw.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/MjdghWA/mountain_sniper_shoot_3d_mod_apk.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/number_system_aptitude_tricks_in_tamil.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/89918858820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nisoxow/are_all_the_chronicles_of_narnia_movies_on_disney_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf254b7-e31c-498f-8498-e719b1121e4a/default_password_for_netgear_nighthawk_m1.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_c9ffa2582b224b6285f6364627b2600e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8249f823-8623-4547-9eca-62db080bb6dd/jopokaladobazax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397f61fb-544a-4869-b4c7-4c6ef1138997/jogojoxutujivi.pdfIn PDF document text
    • http://zapusov.atwebpages.com/13326462401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07eaa77-8bce-4f5a-a93d-52c4e64ea836/63443567235.pdfIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_b6c7a08844854955bbe47873a1cb5364.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_579d25793ef04c43b6ab99fcf42e5860.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf420ba-822e-4987-bd1e-62ceb8bd2782/koruzimusaloti.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/harga_maybelline_baby_skin_instant_pink_transformer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80a2493-af91-42a2-b1e1-c6940d702a83/wabasusiwabadij.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/fepim.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/international_pronunciation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/aruba_airwave_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/betulimu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 4912 bytes
SHA-256: d5b0ebb75cc88b615c580731cf6c5eadfaf915ab2271d7a392509c473db1c4c6
font_01_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 24448 bytes
SHA-256: b3270a035635ab66024ab0380c6af7bd3f24332d0aa8b2ab751d27ab87334a99
font_02_sfnt_off00014f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F12 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off000163aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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