Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c0bb84274af6ac…

MALICIOUS

PDF

82.8 KB Created: 2021-04-30 19:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1d3baec7f06e547798e03f201961438b SHA-1: 9c966aab3699921db787a8340aa1a7de0d5774ec SHA-256: c2c0bb84274af6ac3bc9f6cc8b005c7fded814cef6562922bb1fffef39cf2db1
292 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of embedded links, many pointing to disposable hosting, and one specifically identified as a malicious redirector. The 'ClickFix' heuristic indicates the document likely instructs the user to execute a command or open a link, combined with an urgency lure, suggesting a phishing or malware delivery attempt. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dafemum.ru/strik?utm_term=metal+gear+solid+2+sons+of+liberty+xbox+controls In PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/7624731.pdfIn PDF document text
    • http://my-favshopc.online/does_corporate_social_responsibility_benefit_societyy072y.pdfIn PDF document text
    • http://kindraretterath.com/bryant_furnace_troubleshooting_code_31yl0tm.pdfIn PDF document text
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/rojinekejasux-majilem-ziwujekobo.pdfIn PDF document text
    • http://mibijuzorifif.getenjoyment.net/abbi_glines_making_a_play.pdfIn PDF document text
    • http://afterdealer.pro/11036684576i0k8.pdfIn PDF document text
    • http://regsenatvumen.website/2164079543qechz.pdfIn PDF document text
    • https://kogijusixi.weebly.com/uploads/1/3/5/3/135312463/d1c73fc7c86c.pdfIn PDF document text
    • http://generalmassage.online/9126484443fstgl.pdfIn PDF document text
    • https://gifenatewa.weebly.com/uploads/1/3/4/4/134480542/rudupanafo_leropuxoga.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/6772133.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/38d98ad435a42.pdfIn PDF document text
    • http://italywow.space/dixukojer5zzgy.pdfIn PDF document text
    • http://instapriz365.site/2011_craftsman_gt_6000_owners_manualojsdx.pdfIn PDF document text
    • https://motubisirewu.weebly.com/uploads/1/3/4/5/134529252/potevir.pdfIn PDF document text
    • http://wovugikanagak.scienceontheweb.net/58580407181.pdfIn PDF document text
    • https://mejofeva.weebly.com/uploads/1/3/2/6/132681501/5161985.pdfIn PDF document text
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/gederofedakezig.pdfIn PDF document text
    • https://siropenisawad.weebly.com/uploads/1/3/4/3/134353493/vipapakelafu-mixanepi-juxafopopur-sidagomazife.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/5317144593.pdfIn PDF document text
    • http://istra-backwater.ru/44187304841o9x7c.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/polujesax.pdfIn PDF document text
    • http://psychologyrelax.xyz/2004_ford_focus_hatchbackidym6.pdfIn PDF document text
    • http://hermidkovo.info/adobe_indesign_childrens_book_template7c1fx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/vegobufixenetugigire.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_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 5636 bytes
SHA-256: 466638be9cd3ae8458f971188b15a265282e69c5b22b1969a58ec50fe8459674
font_01_sfnt_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 11240 bytes
SHA-256: 5ce99607eaa9e403cb4607dd6bb22433476e3844e60052cc4983c7a56ff656cb