Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4563b4ce278890a…

MALICIOUS

PDF

94.7 KB Created: 2021-03-10 14:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8719661a927e8015786f3bf4bea611f1 SHA-1: 11f059c092e762591a919beac344fe72c09a4f4e SHA-256: d4563b4ce278890a815894b8423fdbe8bc9c3567321a95b1c5e6def5052fb2c4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and Weebly hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the presence of external URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://zajinet.ru/123?utm_term=vba+set+variable+as+worksheet+name PDF link annotation
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/zakip_mabotokaruwojo_riranaxu_woxaluxixofej.pdfIn PDF document text
    • http://lotupojaxuvutix.mygamesonline.org/53846177472.pdfIn PDF document text
    • http://jaxotibovafel.iblogger.org/how_to_get_current_currency_rate_in_excel.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/kevuri_kedevope.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/35611288735.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/fbf83a8c202.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/4436537.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/513388.pdfIn PDF document text
    • http://guwobedegaf.22web.org/osmosis_imdb_parents_guide.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/tusofozifumimavaj.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/cc501.pdfIn PDF document text
    • http://xojokare.iblogger.org/3622879978.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/8bd5895a5d3.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/dfdb180.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
    • http://gokozir.rf.gd/jexiremudefonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde3978b-aab9-4d79-9557-c9deaeaf1785/age_limit_for_car_seat_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3c27ae-c791-4e69-a0b9-22383429f3ae/37797832049.pdfIn PDF document text
    • http://dawonudugol.rf.gd/derajomuwibugipazi.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/how_to_cook_steak_on_foreman_grill.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/what_should_i_write_in_performance_appraisal_example.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/soruxomofoparoxiboxoj.pdfIn PDF document text
    • http://besuwodusibix.rf.gd/defivabirunujimesubuf.pdfIn PDF document text
    • http://sufizaj.rf.gd/browserslisterror_unknown_browser_query_android_all_react.pdfIn PDF document text
    • http://tonesovuxor.rf.gd/92813252957.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE1 5036 bytes
SHA-256: c7443d962c069fe8c66c233c9710535546207a6971e48aaeae85c97abee0d76e
font_01_sfnt_off00012cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD3 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off00013833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13833 11068 bytes
SHA-256: 522445894a0ac55e3b3dbf4453d11d0a3e79503c4b73bc3667d9daef5a308e9f
font_03_sfnt_off00015e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E12 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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