Malicious PDF — malware analysis report

Static analysis result for SHA-256 80981fcf3efc8ac4…

MALICIOUS

PDF

76.0 KB Created: 2021-02-19 09:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8eb2b067dca75ad1d1057342089f4a3b SHA-1: e7869fe78a7c5dc36c7e989b88c515f18fd5fb23 SHA-256: 80981fcf3efc8ac4b3e410f1783be085763c85408ff46e2317baabe826ce3559
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and it contains a significant number of external links, indicating a link farm or SEO poisoning attempt. One of the primary URLs extracted, 'https://crophysi.ru/123?utm_term=how+to+apply+volume+lash+extensions', suggests a lure related to beauty or cosmetic procedures to entice users to click. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://crophysi.ru/123?utm_term=how+to+apply+volume+lash+extensions PDF link annotation
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/5963491.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/O1Wif9H/vejanarutevadotugim.pdfIn PDF document text
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/rozujupez_jediganokuxiful_xexutevazoved_razijegojulu.pdfIn PDF document text
    • https://sukigemanewa.weebly.com/uploads/1/3/2/6/132681928/016fb2932d59b18.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/fVImhhS/bet365_new_account_offers.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/f8hbSAh/rusk_deepshine_conditioning_cream_color.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/pagekuz.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/guxosa/fizivavod.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/mabovivonilixitevo.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/automatic_vs_manual_winding_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/66400108457.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/92346223582.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/asphalt_8_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/44944115251.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/what_do_the_three_branches_of_government_do_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/weather_report_milan_mi.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/presonus_central_station_plus_studio_control_center_with_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/marvel_s_daredevil_episode_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5128 bytes
SHA-256: e7af2fe81704d3bc802480a21be54e3b2d375937286b87476579d1f6102e03d9
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10816 bytes
SHA-256: 5269f800250e55ab25b2b800e1858e13384bd11e3e290ab99542669138e953d0
font_02_sfnt_off000114a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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